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 A207553 #7 Apr 21 2021 14:00:17 %S A207553 216,46656,7104784,1033847229,151596413811,22310125127129, %T A207553 3281119335987704,482409110595369417,70913221471442436735, %U A207553 10423970912644421821948,1532250473752733562395242 %N A207553 Number of 5 X n 0..2 arrays avoiding the pattern z-2 z-1 z in any row, column, nw-to-se diagonal or ne-to-sw antidiagonal. %C A207553 Row 5 of A207550. %H A207553 R. H. Hardin, <a href="/A207553/b207553.txt">Table of n, a(n) for n = 1..210</a> %e A207553 Some solutions for n=4 %e A207553 ..0..2..2..0....1..0..2..0....2..0..1..0....2..2..1..2....2..1..0..0 %e A207553 ..0..1..0..1....1..0..0..0....0..2..1..0....2..2..1..0....1..1..1..0 %e A207553 ..1..2..0..0....2..1..0..0....2..1..2..1....0..1..0..1....0..1..0..2 %e A207553 ..1..2..2..2....0..0..0..0....2..2..1..0....0..1..0..0....2..0..2..1 %e A207553 ..1..2..1..1....2..0..0..1....0..2..2..2....0..2..0..0....1..1..1..0 %Y A207553 Cf. A207550. %K A207553 nonn %O A207553 1,1 %A A207553 _R. H. Hardin_ Feb 18 2012