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 A262270 #4 Sep 17 2015 08:19:49 %S A262270 13,169,585,3253,37061,467065,4403641,49793329,628659565,8114855785, %T A262270 100698388425,1284102518917,16612868083733,215733029771449, %U A262270 2784755393197465,36096259647083761,468882349083176077 %N A262270 Number of (n+2)X(4+2) 0..1 arrays with each row and column divisible by 5, read as a binary number with top and left being the most significant bits. %C A262270 Column 4 of A262274. %H A262270 R. H. Hardin, <a href="/A262270/b262270.txt">Table of n, a(n) for n = 1..210</a> %e A262270 Some solutions for n=4 %e A262270 ..1..1..1..1..0..0....0..0..0..0..0..0....0..0..0..1..0..1....1..0..1..0..0..0 %e A262270 ..0..1..1..1..1..0....1..1..0..0..1..0....0..0..0..1..0..1....0..0..0..0..0..0 %e A262270 ..0..0..0..0..0..0....1..1..0..1..1..1....0..0..0..0..0..0....1..0..1..1..0..1 %e A262270 ..0..1..1..1..1..0....0..0..0..0..0..0....1..0..1..1..0..1....0..0..0..0..0..0 %e A262270 ..1..1..1..1..0..0....0..0..0..1..0..1....0..0..0..1..0..1....0..0..0..1..0..1 %e A262270 ..1..1..1..1..0..0....1..1..0..0..1..0....1..0..1..1..0..1....0..0..0..0..0..0 %Y A262270 Cf. A262274. %K A262270 nonn %O A262270 1,1 %A A262270 _R. H. Hardin_, Sep 17 2015