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 A231761 #6 Jul 23 2025 06:40:57 %S A231761 961,15625,356409,8231161,175642009,3855664836,85629975876, %T A231761 1881009507001,41320353904281,910635938795025,20049876927417744, %U A231761 441133454459003524,9710711221453585281,213776317733333022369,4705328739274857392400 %N A231761 Number of (n+1)X(5+1) 0..1 arrays with no element having a strict majority of its horizontal, diagonal and antidiagonal neighbors equal to one. %C A231761 Column 5 of A231764 %H A231761 R. H. Hardin, <a href="/A231761/b231761.txt">Table of n, a(n) for n = 1..210</a> %e A231761 Some solutions for n=2 %e A231761 ..0..0..1..1..1..0....0..0..0..0..1..0....1..0..0..0..0..0....1..0..0..0..0..0 %e A231761 ..1..1..0..0..0..1....0..0..0..0..0..1....1..0..0..1..0..0....0..1..1..0..0..0 %e A231761 ..0..0..1..0..0..0....0..1..0..0..0..1....0..1..1..0..0..0....1..0..0..1..1..0 %K A231761 nonn %O A231761 1,1 %A A231761 _R. H. Hardin_, Nov 13 2013