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 A302154 #4 Apr 02 2018 14:31:59 %S A302154 32,1,84,257,1529,15999,145150,1482725,15902462,174951740,1970629796, %T A302154 22494667102,258629509515,2984220411587,34476629235844, %U A302154 398556898099009,4609165601937455,53315795633961409,616815626588521291 %N A302154 Number of 6Xn 0..1 arrays with every element equal to 0, 2, 3 or 4 horizontally or antidiagonally adjacent elements, with upper left element zero. %C A302154 Row 6 of A302150. %H A302154 R. H. Hardin, <a href="/A302154/b302154.txt">Table of n, a(n) for n = 1..210</a> %e A302154 Some solutions for n=5 %e A302154 ..0..1..1..1..1. .0..1..1..1..1. .0..1..1..1..1. .0..1..0..1..1 %e A302154 ..1..1..1..1..1. .1..1..1..1..1. .1..1..1..1..1. .0..1..1..1..0 %e A302154 ..0..1..1..1..1. .1..1..1..1..1. .1..1..1..1..1. .1..1..1..1..1 %e A302154 ..1..1..0..1..1. .0..1..1..1..1. .1..1..0..1..0. .0..1..1..1..1 %e A302154 ..1..1..1..1..1. .1..1..0..1..1. .1..1..1..1..1. .1..1..1..1..0 %e A302154 ..0..1..1..1..0. .1..1..1..1..0. .1..1..1..1..0. .1..1..0..1..0 %Y A302154 Cf. A302150. %K A302154 nonn %O A302154 1,1 %A A302154 _R. H. Hardin_, Apr 02 2018