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 A301845 #6 Mar 27 2018 14:37:28 %S A301845 16,512,4299,48802,496085,5240684,54948498,577194574,6070236888, %T A301845 63855283956,671950959732,7071734560895,74426242914307, %U A301845 783303529316947,8243938456863301,86764009232555716,913155201853131784 %N A301845 Number of 5Xn 0..1 arrays with every element equal to 0, 1 or 2 horizontally or antidiagonally adjacent elements, with upper left element zero. %C A301845 Row 5 of A301841. %H A301845 R. H. Hardin, <a href="/A301845/b301845.txt">Table of n, a(n) for n = 1..210</a> %H A301845 R. H. Hardin, <a href="/A301845/a301845.txt">Empirical recurrence of order 99</a> %F A301845 Empirical recurrence of order 99 (see link above) %e A301845 Some solutions for n=5 %e A301845 ..0..0..0..1..1. .0..0..0..1..1. .0..0..0..0..1. .0..0..0..1..0 %e A301845 ..1..1..0..0..1. .1..0..1..0..1. .1..1..0..1..1. .1..1..0..1..0 %e A301845 ..1..1..1..0..1. .1..0..1..0..0. .0..1..0..1..1. .0..1..0..1..0 %e A301845 ..0..1..0..1..0. .0..0..1..1..0. .0..1..0..1..0. .1..0..1..1..0 %e A301845 ..0..1..0..1..1. .0..1..0..1..1. .0..1..1..0..1. .1..0..0..1..0 %Y A301845 Cf. A301841. %K A301845 nonn %O A301845 1,1 %A A301845 _R. H. Hardin_, Mar 27 2018