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 A262273 #4 Sep 17 2015 08:22:20 %S A262273 103,10609,129481,4403641,411861253,41261408089,3605017226155, %T A262273 349760937840517,35889961902343951,3691924453378494385, %U A262273 377481144200284897993,38754821017971389203489,3991173847744285567358317 %N A262273 Number of (n+2)X(7+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 A262273 Column 7 of A262274. %H A262273 R. H. Hardin, <a href="/A262273/b262273.txt">Table of n, a(n) for n = 1..18</a> %e A262273 Some solutions for n=3 %e A262273 ..1..1..0..1..0..1..0..0..1....0..0..0..0..0..1..0..1..0 %e A262273 ..0..1..0..1..0..1..0..1..0....0..1..0..1..1..1..0..0..1 %e A262273 ..1..1..1..0..1..0..0..0..1....0..0..1..0..1..1..0..1..0 %e A262273 ..0..1..0..0..0..0..0..1..0....0..1..0..1..1..1..0..0..1 %e A262273 ..0..0..1..1..1..1..0..0..0....0..0..1..0..1..0..0..0..0 %Y A262273 Cf. A262274. %K A262273 nonn %O A262273 1,1 %A A262273 _R. H. Hardin_, Sep 17 2015