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 A265116 #3 Dec 01 2015 17:56:22 %S A265116 1,0,6,624,6592,126764,3493730 %N A265116 Number of nX4 arrays of permutations of 4 copies of 0..n-1 with row sums equal, column sums equal and full-length antidiagonal sums equal to the short dimension sums. %C A265116 Column 4 of A265117. %e A265116 Some solutions for n=5 %e A265116 ..1..1..4..2....1..4..1..2....2..4..0..2....2..0..2..4....1..4..3..0 %e A265116 ..0..4..0..4....4..1..3..0....2..3..3..0....1..4..1..2....0..3..3..2 %e A265116 ..3..3..0..2....0..0..4..4....0..1..3..4....3..2..3..0....2..1..1..4 %e A265116 ..3..1..2..2....3..2..2..1....2..1..1..4....1..0..4..3....4..2..2..0 %e A265116 ..3..1..4..0....2..3..0..3....4..1..3..0....3..4..0..1....3..0..1..4 %Y A265116 Cf. A265117. %K A265116 nonn %O A265116 1,3 %A A265116 _R. H. Hardin_, Dec 01 2015