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 A231767 #6 Jul 23 2025 06:41:30 %S A231767 36,660,5041,38160,356409,3453471,30958096,275036364,2497000900, %T A231767 22773363171,206128712196,1863472732275,16885039757881, %U A231767 153067510948440,1386533696771344,12557954163081200,113765768465994225 %N A231767 Number of (3+1)X(n+1) 0..1 arrays with no element having a strict majority of its horizontal, diagonal and antidiagonal neighbors equal to one. %C A231767 Row 3 of A231764 %H A231767 R. H. Hardin, <a href="/A231767/b231767.txt">Table of n, a(n) for n = 1..210</a> %e A231767 Some solutions for n=4 %e A231767 ..1..0..0..1..0....0..0..0..0..0....0..0..1..0..0....0..1..1..1..0 %e A231767 ..0..0..1..0..1....0..0..1..1..1....1..0..0..0..1....1..0..0..0..0 %e A231767 ..0..0..0..0..0....1..0..0..0..0....0..1..0..0..0....0..0..1..0..0 %e A231767 ..0..0..1..0..0....0..0..0..0..0....1..0..1..1..1....0..1..1..1..0 %K A231767 nonn %O A231767 1,1 %A A231767 _R. H. Hardin_, Nov 13 2013