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 A208095 #12 May 18 2020 03:01:31 %S A208095 1,15,7239,34438557,677352910013,37155328943771767, %T A208095 4558466722941178786343,1086389216314310418981064791, %U A208095 455984828225593734632397603864943,313575182393219205765164919469780819082,334231574923251058616578365205688685770273545 %N A208095 Number of n X 5 nonnegative integer arrays with new values 0 upwards introduced in row major order and no element equal to any horizontal, diagonal or antidiagonal neighbor (colorings ignoring permutations of colors). %H A208095 Andrew Howroyd, <a href="/A208095/b208095.txt">Table of n, a(n) for n = 0..100</a> %e A208095 Some solutions for n=4 %e A208095 ..0..1..2..0..1....0..1..0..1..0....0..1..0..1..0....0..1..0..1..0 %e A208095 ..0..1..2..0..1....0..1..0..1..0....0..2..0..1..0....0..1..0..1..0 %e A208095 ..0..1..2..0..1....2..1..0..1..0....0..1..0..1..0....0..1..0..1..0 %e A208095 ..0..1..2..3..1....0..1..0..1..0....0..3..0..1..0....0..1..0..1..0 %Y A208095 Column 5 of A208096. %K A208095 nonn %O A208095 0,2 %A A208095 _R. H. Hardin_, Feb 23 2012 %E A208095 a(0)=1 prepended and terms a(6) and beyond from _Andrew Howroyd_, May 17 2020