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 A221436 #5 Jul 23 2025 01:55:39 %S A221436 720,190800,15321600,283046400,812851200,812851200,61479419904000 %N A221436 Number of nX6 1..(max n,6) arrays with each row and column having unrepeated values. %C A221436 Column 6 of A221438 %e A221436 Some solutions for n=3 %e A221436 ..1..6..2..3..5..4....1..3..2..5..4..6....1..3..2..6..4..5....1..4..2..5..3..6 %e A221436 ..4..3..1..6..2..5....2..1..4..6..5..3....2..1..5..4..3..6....6..3..5..2..1..4 %e A221436 ..6..2..4..5..3..1....6..5..1..3..2..4....5..6..4..3..1..2....2..6..4..1..5..3 %K A221436 nonn %O A221436 1,1 %A A221436 _R. H. Hardin_ Jan 16 2013