This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A229369 #7 Jul 23 2025 05:41:08 %S A229369 164,4144,122497,3576912,104382552,3043629267,89084628843, %T A229369 2599351293506,76022735747576,2220055036850204,64891952478301245, %U A229369 1895740602154065042,55399224157117918936,1618646788430829125358,47297972275705523494868 %N A229369 Number of nX5 0..2 arrays avoiding 11 horizontally, 22 vertically and 00 antidiagonally. %C A229369 Column 5 of A229372 %H A229369 R. H. Hardin, <a href="/A229369/b229369.txt">Table of n, a(n) for n = 1..210</a> %H A229369 R. H. Hardin, <a href="/A229369/a229369.txt">Empirical recurrence of order 50</a> %F A229369 Empirical recurrence of order 50 (see link above) %e A229369 Some solutions for n=3 %e A229369 ..1..2..2..1..2....2..1..0..0..2....0..2..0..1..2....1..2..1..2..1 %e A229369 ..0..1..0..0..1....0..1..2..1..0....0..1..2..0..1....1..0..0..1..2 %e A229369 ..1..2..2..0..1....0..0..1..2..1....2..2..1..0..0....2..1..2..0..0 %K A229369 nonn %O A229369 1,1 %A A229369 _R. H. Hardin_ Sep 21 2013