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

%I #7 Aug 12 2016 06:53:58

%S 1,2,7,112,4919,1268728,1001060834,4031708477982

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

%C Diagonal of A265005.

%e Some solutions for n=4

%e ..0..0..0..1....0..0..1..3....0..0..1..3....0..0..0..1....0..0..0..2

%e ..0..1..2..2....0..1..1..3....0..1..1..3....0..1..1..1....0..1..1..3

%e ..1..1..3..3....0..1..2..3....0..2..2..3....2..2..2..2....1..1..2..3

%e ..2..2..3..3....2..2..2..3....1..2..2..3....3..3..3..3....2..2..3..3

%Y Cf. A265005.

%K nonn

%O 1,2

%A _R. H. Hardin_, Nov 29 2015