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 A268366 #5 Aug 11 2016 20:20:36 %S A268366 1,400,1054200,12243840000,429355384500000,39489843246336000000, %T A268366 7875251932432856328000000,3103313606339070135803904000000, %U A268366 2222194400107579127937216888000000000 %N A268366 Number of n X 6 arrays of permutations of 6 copies of 0..n-1 with row sums equal. %C A268366 Column 6 of A268367. %e A268366 Some solutions for n=2 %e A268366 ..1..1..0..1..0..0....0..1..0..1..0..1....1..0..1..0..1..0....1..1..0..1..0..0 %e A268366 ..1..0..1..1..0..0....0..1..1..0..1..0....1..1..0..1..0..0....0..1..0..1..0..1 %Y A268366 Cf. A268367. %K A268366 nonn %O A268366 1,2 %A A268366 _R. H. Hardin_, Feb 03 2016