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 A231760 #6 Jul 23 2025 06:40:50 %S A231760 315,2976,38160,493695,5879679,71884125,893571840,10965349591, %T A231760 134407778400,1654812479232,20352945004533,250055045333667, %U A231760 3074220674469117,37799970801628952,464662025973498675 %N A231760 Number of (n+1)X(4+1) 0..1 arrays with no element having a strict majority of its horizontal, diagonal and antidiagonal neighbors equal to one. %C A231760 Column 4 of A231764 %H A231760 R. H. Hardin, <a href="/A231760/b231760.txt">Table of n, a(n) for n = 1..210</a> %e A231760 Some solutions for n=3 %e A231760 ..0..0..0..1..1....1..0..1..0..0....1..0..0..1..1....1..1..0..1..1 %e A231760 ..0..0..0..0..0....0..0..0..0..0....1..1..0..0..0....0..0..0..0..0 %e A231760 ..0..1..0..0..0....0..1..0..0..1....0..0..0..0..1....0..0..0..0..0 %e A231760 ..1..0..1..1..1....1..0..0..0..0....1..0..1..1..0....1..1..0..0..0 %K A231760 nonn %O A231760 1,1 %A A231760 _R. H. Hardin_, Nov 13 2013