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 A206955 #7 Aug 25 2022 11:35:33 %S A206955 529,279841,77359677,20694430627,5791955969105,1627105474024831, %T A206955 455424052435622710,127415469361104045376,35660555119587820948873, %U A206955 9981129255257517818294172,2793527706022549350443155754 %N A206955 Number of n X 6 0..2 arrays avoiding the pattern z z+1 z in any row, column or nw-to-se diagonal. %C A206955 Column 6 of A206957. %H A206955 R. H. Hardin, <a href="/A206955/b206955.txt">Table of n, a(n) for n = 1..96</a> %e A206955 Some solutions for n=4 %e A206955 ..2..0..1..1..2..2....0..1..2..2..2..0....1..1..1..2..0..2....2..2..1..2..2..2 %e A206955 ..0..1..1..2..2..2....0..1..1..2..0..1....2..0..1..1..0..1....1..0..0..1..2..2 %e A206955 ..1..1..0..2..0..2....2..0..1..1..0..2....2..1..1..1..0..0....0..1..1..0..2..2 %e A206955 ..2..1..1..0..2..0....1..1..2..0..0..2....0..1..2..2..0..2....0..1..1..1..0..2 %Y A206955 Cf. A206957. %K A206955 nonn %O A206955 1,1 %A A206955 _R. H. Hardin_, Feb 13 2012