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 A301962 #4 Mar 29 2018 13:00:41 %S A301962 13,22,74,219,749,2544,8705,29750,101869,348726,1194018,4088095, %T A301962 13997248,47925030,164090446,561828851,1923644742,6586363735, %U A301962 22551038555,77212460575,264367602921,905167759481,3099202251216,10611352989541 %N A301962 Number of nX6 0..1 arrays with every element equal to 0, 1 or 4 horizontally or antidiagonally adjacent elements, with upper left element zero. %C A301962 Column 6 of A301964. %H A301962 R. H. Hardin, <a href="/A301962/b301962.txt">Table of n, a(n) for n = 1..210</a> %F A301962 Empirical: a(n) = a(n-1) +8*a(n-2) +4*a(n-3) -8*a(n-4) -7*a(n-5) -a(n-6) -3*a(n-7) +a(n-8) +5*a(n-9) -3*a(n-10) +a(n-11) for n>12 %e A301962 Some solutions for n=5 %e A301962 ..0..0..1..0..1..0. .0..0..1..0..1..0. .0..1..1..0..1..0. .0..1..0..1..0..1 %e A301962 ..1..1..1..0..1..1. .1..0..0..0..1..0. .0..0..1..0..1..0. .0..0..0..1..1..1 %e A301962 ..1..0..1..0..0..1. .1..0..1..0..0..0. .1..0..0..0..1..0. .0..1..0..1..0..1 %e A301962 ..1..0..1..1..0..0. .1..1..1..0..1..0. .1..0..1..1..1..0. .0..1..0..1..1..1 %e A301962 ..1..0..0..1..1..0. .1..0..1..0..1..1. .1..0..1..0..1..1. .0..1..0..1..0..1 %Y A301962 Cf. A301964. %K A301962 nonn %O A301962 1,1 %A A301962 _R. H. Hardin_, Mar 29 2018