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 A202887 #8 Jul 19 2023 09:40:04 %S A202887 121,96941,45332961,19914296913,9024909392725,4095290003129296, %T A202887 1855037301620277541,840314045399310110892,380686256792369384392819, %U A202887 172460622525800448862240139,78128840457226148615810468318 %N A202887 Number of nX6 0..2 arrays with every nonzero element less than or equal to some horizontal or vertical neighbor. %H A202887 R. H. Hardin, <a href="/A202887/b202887.txt">Table of n, a(n) for n = 1..210</a> %e A202887 Some solutions for n=2 %e A202887 ..1..2..2..0..2..2....1..0..1..1..2..2....1..2..1..1..2..2....1..1..1..0..0..0 %e A202887 ..0..0..1..0..1..2....1..1..0..0..0..1....0..2..2..0..0..2....0..2..2..0..2..2 %Y A202887 Column 6 of A202889. %K A202887 nonn %O A202887 1,1 %A A202887 _R. H. Hardin_, Dec 25 2011