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 A206697 #7 Jul 22 2025 19:37:24 %S A206697 216,46656,8366690,1488199144,262482902920,46260684361347, %T A206697 8149739471342829,1435662206447144342,252901661556478734640, %U A206697 44550197492083630730323,7847785175617092397593472 %N A206697 Number of nX5 0..2 arrays avoiding the pattern z-2 z-1 z in any row or column. %C A206697 Column 5 of A206700 %H A206697 R. H. Hardin, <a href="/A206697/b206697.txt">Table of n, a(n) for n = 1..210</a> %e A206697 Some solutions for n=4 %e A206697 ..0..0..2..0..0....0..1..0..2..2....2..0..1..0..0....2..0..1..0..2 %e A206697 ..2..2..2..1..1....2..0..1..0..0....2..1..0..2..1....1..1..1..1..2 %e A206697 ..0..2..2..0..1....1..1..0..1..0....2..1..2..2..1....1..0..2..0..0 %e A206697 ..0..1..0..0..2....1..1..2..0..2....2..0..2..2..2....1..0..2..2..1 %K A206697 nonn %O A206697 1,1 %A A206697 _R. H. Hardin_ Feb 11 2012