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 A229377 #7 Jul 23 2025 05:41:50 %S A229377 164,2138,48490,956866,20014278,407900408,8454015792,173331549156, %T A229377 3583467036398,73637531304764,1520470917860158,31281412038561736, %U A229377 645413766480453102,13287410455121938834,274025926174436180190 %N A229377 Number of nX5 0..2 arrays avoiding 11 horizontally, 22 vertically and 00 diagonally or antidiagonally. %C A229377 Column 5 of A229380 %H A229377 R. H. Hardin, <a href="/A229377/b229377.txt">Table of n, a(n) for n = 1..210</a> %H A229377 R. H. Hardin, <a href="/A229377/a229377.txt">Empirical recurrence of order 64</a> %F A229377 Empirical recurrence of order 64 (see link above) %e A229377 Some solutions for n=3 %e A229377 ..2..1..2..2..2....2..0..1..2..2....1..0..1..0..0....0..0..1..2..0 %e A229377 ..0..0..0..0..1....1..2..2..0..0....2..1..2..2..2....2..2..2..1..0 %e A229377 ..2..2..2..1..2....0..0..1..2..2....1..0..0..0..1....1..0..0..2..0 %K A229377 nonn %O A229377 1,1 %A A229377 _R. H. Hardin_ Sep 21 2013