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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.

A264999 Number of n X n arrays containing n copies of 0..n-1 with rows and columns nondecreasing.

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%I A264999 #7 Aug 12 2016 06:53:58
%S A264999 1,2,7,112,4919,1268728,1001060834,4031708477982
%N A264999 Number of n X n arrays containing n copies of 0..n-1 with rows and columns nondecreasing.
%C A264999 Diagonal of A265005.
%e A264999 Some solutions for n=4
%e A264999 ..0..0..0..1....0..0..1..3....0..0..1..3....0..0..0..1....0..0..0..2
%e A264999 ..0..1..2..2....0..1..1..3....0..1..1..3....0..1..1..1....0..1..1..3
%e A264999 ..1..1..3..3....0..1..2..3....0..2..2..3....2..2..2..2....1..1..2..3
%e A264999 ..2..2..3..3....2..2..2..3....1..2..2..3....3..3..3..3....2..2..3..3
%Y A264999 Cf. A265005.
%K A264999 nonn
%O A264999 1,2
%A A264999 _R. H. Hardin_, Nov 29 2015

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