%I #3 Nov 29 2015 16:07:09
%S 1,4,41,846,27000,1268728,76714325,5732148226,507120480166,
%T 51689513352516
%N Number of nX6 arrays of permutations of 6 copies of 0..n-1 with rows and columns nondecreasing.
%C Column 6 of A265005.
%e Some solutions for n=4
%e ..0..0..0..1..1..2....0..0..0..1..2..2....0..0..0..1..1..1....0..0..0..1..1..2
%e ..0..1..1..1..2..3....0..1..1..1..2..2....0..0..0..1..1..2....0..1..1..1..1..2
%e ..0..1..2..2..3..3....0..1..1..2..3..3....1..2..2..2..3..3....0..2..2..3..3..3
%e ..0..2..2..3..3..3....0..2..3..3..3..3....2..2..3..3..3..3....0..2..2..3..3..3
%Y Cf. A265005.
%K nonn
%O 1,2
%A _R. H. Hardin_, Nov 29 2015
|