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 A231321 #6 Jul 23 2025 06:24:33 %S A231321 11616,3917184,1695860064,677392128096,277024322215296, %T A231321 112717970818679904,45929855692690790400,18711513985409981683296, %U A231321 7623482985272651235333504,3105964603406107757886555744 %N A231321 Number of (n+1)X(5+1) 0..2 arrays with no element equal to a strict majority of its diagonal and antidiagonal neighbors, with values 0..2 introduced in row major order. %C A231321 Column 5 of A231324 %H A231321 R. H. Hardin, <a href="/A231321/b231321.txt">Table of n, a(n) for n = 1..51</a> %e A231321 Some solutions for n=1 %e A231321 ..0..0..0..0..1..2....0..1..2..0..2..2....0..0..1..1..1..0....0..1..2..0..2..2 %e A231321 ..1..2..2..2..1..2....2..2..1..1..0..0....2..2..0..2..2..0....2..2..2..0..1..1 %K A231321 nonn %O A231321 1,1 %A A231321 _R. H. Hardin_, Nov 07 2013