OEIS Parity Triangles
@oeistriangles.peterkagey.com
A bot by @peterkagey.com that posts a Parity Triangle from the OEIS every day.
See my blog post for more details: https://peterkagey.com/blog/2021/03/parity-bitmaps-from-the-oeis/
See my blog post for more details: https://peterkagey.com/blog/2021/03/parity-bitmaps-from-the-oeis/
OEIS sequence A135230 by Gary W. Adamson (November 2007).
(Even terms are drawn as dark hexagons and odd terms are drawn as light hexagons.)
(Even terms are drawn as dark hexagons and odd terms are drawn as light hexagons.)
January 16, 2026 at 6:11 AM
OEIS sequence A135230 by Gary W. Adamson (November 2007).
(Even terms are drawn as dark hexagons and odd terms are drawn as light hexagons.)
(Even terms are drawn as dark hexagons and odd terms are drawn as light hexagons.)
OEIS sequence A105147 by Vladeta Jovovic (April 2005).
(Even terms are drawn as dark hexagons and odd terms are drawn as light hexagons.)
(Even terms are drawn as dark hexagons and odd terms are drawn as light hexagons.)
January 14, 2026 at 7:09 AM
OEIS sequence A105147 by Vladeta Jovovic (April 2005).
(Even terms are drawn as dark hexagons and odd terms are drawn as light hexagons.)
(Even terms are drawn as dark hexagons and odd terms are drawn as light hexagons.)
OEIS sequence A143565 by Alois P. Heinz (August 2008).
(Even terms are drawn as dark hexagons and odd terms are drawn as light hexagons.)
(Even terms are drawn as dark hexagons and odd terms are drawn as light hexagons.)
January 13, 2026 at 7:38 AM
OEIS sequence A143565 by Alois P. Heinz (August 2008).
(Even terms are drawn as dark hexagons and odd terms are drawn as light hexagons.)
(Even terms are drawn as dark hexagons and odd terms are drawn as light hexagons.)
OEIS sequence A094665 by Philippe Deléham (June 2004).
(Even terms are drawn as dark hexagons and odd terms are drawn as light hexagons.)
(Even terms are drawn as dark hexagons and odd terms are drawn as light hexagons.)
January 11, 2026 at 8:36 AM
OEIS sequence A094665 by Philippe Deléham (June 2004).
(Even terms are drawn as dark hexagons and odd terms are drawn as light hexagons.)
(Even terms are drawn as dark hexagons and odd terms are drawn as light hexagons.)
OEIS sequence A173047 by Roger L. Bagula (February 2010).
(Even terms are drawn as dark hexagons and odd terms are drawn as light hexagons.)
(Even terms are drawn as dark hexagons and odd terms are drawn as light hexagons.)
January 9, 2026 at 9:34 AM
OEIS sequence A173047 by Roger L. Bagula (February 2010).
(Even terms are drawn as dark hexagons and odd terms are drawn as light hexagons.)
(Even terms are drawn as dark hexagons and odd terms are drawn as light hexagons.)
OEIS sequence A285118 by Antti Karttunen (April 2017).
(Even terms are drawn as dark hexagons and odd terms are drawn as light hexagons.)
(Even terms are drawn as dark hexagons and odd terms are drawn as light hexagons.)
January 7, 2026 at 10:32 AM
OEIS sequence A285118 by Antti Karttunen (April 2017).
(Even terms are drawn as dark hexagons and odd terms are drawn as light hexagons.)
(Even terms are drawn as dark hexagons and odd terms are drawn as light hexagons.)
OEIS sequence A193596 by Clark Kimberling (July 2011).
(Even terms are drawn as dark hexagons and odd terms are drawn as light hexagons.)
(Even terms are drawn as dark hexagons and odd terms are drawn as light hexagons.)
January 5, 2026 at 11:30 AM
OEIS sequence A193596 by Clark Kimberling (July 2011).
(Even terms are drawn as dark hexagons and odd terms are drawn as light hexagons.)
(Even terms are drawn as dark hexagons and odd terms are drawn as light hexagons.)
OEIS sequence A220074 by Mokhtar Mohamed (December 2012).
(Even terms are drawn as dark hexagons and odd terms are drawn as light hexagons.)
(Even terms are drawn as dark hexagons and odd terms are drawn as light hexagons.)
December 28, 2025 at 3:22 PM
OEIS sequence A220074 by Mokhtar Mohamed (December 2012).
(Even terms are drawn as dark hexagons and odd terms are drawn as light hexagons.)
(Even terms are drawn as dark hexagons and odd terms are drawn as light hexagons.)
OEIS sequence A100642 by N. J. A. Sloane (December 2004).
(Even terms are drawn as dark hexagons and odd terms are drawn as light hexagons.)
(Even terms are drawn as dark hexagons and odd terms are drawn as light hexagons.)
December 27, 2025 at 3:51 PM
OEIS sequence A100642 by N. J. A. Sloane (December 2004).
(Even terms are drawn as dark hexagons and odd terms are drawn as light hexagons.)
(Even terms are drawn as dark hexagons and odd terms are drawn as light hexagons.)
OEIS sequence A174102 by Roger L. Bagula (March 2010).
(Even terms are drawn as dark hexagons and odd terms are drawn as light hexagons.)
(Even terms are drawn as dark hexagons and odd terms are drawn as light hexagons.)
December 26, 2025 at 4:20 PM
OEIS sequence A174102 by Roger L. Bagula (March 2010).
(Even terms are drawn as dark hexagons and odd terms are drawn as light hexagons.)
(Even terms are drawn as dark hexagons and odd terms are drawn as light hexagons.)
OEIS sequence A302998 by Ilya Gutkovskiy (April 2018).
(Even terms are drawn as dark hexagons and odd terms are drawn as light hexagons.)
(Even terms are drawn as dark hexagons and odd terms are drawn as light hexagons.)
December 25, 2025 at 4:50 PM
OEIS sequence A302998 by Ilya Gutkovskiy (April 2018).
(Even terms are drawn as dark hexagons and odd terms are drawn as light hexagons.)
(Even terms are drawn as dark hexagons and odd terms are drawn as light hexagons.)
As a Christmas gift to the World Wide Web, I've queued up 2065 new triangles to get us through the next five years and beyond!
December 24, 2025 at 8:50 PM
As a Christmas gift to the World Wide Web, I've queued up 2065 new triangles to get us through the next five years and beyond!