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 A275357 #4 Jul 24 2016 10:08:50 %S A275357 365,13824,70272,982152,17258544,306863916,5814135340,110244645536, %T A275357 2098489810224,40114251782424,766949039546240,14666714552507552, %U A275357 280570769528044520,5367279019878620308,102680304956049984556 %N A275357 Number of 7Xn 0..2 arrays with no element equal to any value at offset (-2,-1) (-2,1) or (-1,-2) and new values introduced in order 0..2. %C A275357 Row 7 of A275352. %H A275357 R. H. Hardin, <a href="/A275357/b275357.txt">Table of n, a(n) for n = 1..65</a> %e A275357 Some solutions for n=3 %e A275357 ..0..1..1. .0..1..2. .0..1..2. .0..1..0. .0..0..1. .0..1..0. .0..0..0 %e A275357 ..1..1..2. .2..2..2. .1..2..1. .1..2..1. .0..1..2. .1..2..1. .1..1..1 %e A275357 ..2..2..0. .0..1..0. .0..1..0. .2..1..0. .1..2..1. .0..1..2. .1..2..2 %e A275357 ..0..0..0. .1..0..1. .1..2..1. .0..2..0. .0..1..0. .1..0..1. .2..0..0 %e A275357 ..0..1..1. .0..1..0. .0..2..2. .2..1..2. .1..2..1. .0..1..0. .0..0..1 %e A275357 ..1..2..2. .2..0..2. .0..0..1. .0..1..1. .0..2..0. .2..2..1. .2..1..2 %e A275357 ..0..2..2. .0..1..0. .0..1..1. .2..0..2. .0..0..1. .0..2..0. .2..2..1 %Y A275357 Cf. A275352. %K A275357 nonn %O A275357 1,1 %A A275357 _R. H. Hardin_, Jul 24 2016