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 A207315 #7 Jul 22 2025 20:17:49 %S A207315 622,386884,174545777,76655305645,32960886054362,14121763303437256, %T A207315 6040603302358685420,2582933724901198649918,1104307821349717818359464, %U A207315 472120223465963151312369423,201841505612036976090187423377 %N A207315 Number of nX6 0..2 arrays avoiding the pattern z-2 z-1 z in any row, column or nw-to-se diagonal. %C A207315 Column 6 of A207317 %H A207315 R. H. Hardin, <a href="/A207315/b207315.txt">Table of n, a(n) for n = 1..210</a> %e A207315 Some solutions for n=4 %e A207315 ..0..2..1..2..1..1....1..1..2..1..1..1....0..2..2..1..1..2....2..2..1..0..1..1 %e A207315 ..1..1..2..0..1..0....0..1..0..2..1..2....2..1..2..0..1..1....0..0..2..0..0..0 %e A207315 ..0..1..1..1..1..2....2..1..0..0..1..1....2..1..1..0..1..0....0..1..1..0..0..1 %e A207315 ..1..2..2..0..0..1....1..0..0..1..0..2....0..1..1..2..0..0....0..0..0..0..0..1 %K A207315 nonn %O A207315 1,1 %A A207315 _R. H. Hardin_ Feb 16 2012