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%I #3 Nov 21 2015 07:48:05
%S 1,5,68,1378,26662,975419,54443028,4147768144
%N Number of nX3 arrays of permutations of 0..n*3-1 with rows nondecreasing modulo 4 and columns nondecreasing modulo 5.
%C Column 3 of A264698.
%e Some solutions for n=5
%e .12..5.10....5..6.10...10.11..7....5..7.11....0..6.10....5..6.10....0..1.10
%e ..8..0..6....0.11..7....5..1..2....0..8..1....1.13..5....0..8..1....5..6.11
%e .13.11..7...12..1..2....0..8.12...10.14..6....7..3.11....2..3.11....8.12..2
%e ..9..1..3....4..8..3....6.14..3...12..4..2...12..9..2...12.13..7....4..7..3
%e ..4..2.14....9.13.14....4..9.13...13..9..3....8..4.14....4..9.14....9.13.14
%Y Cf. A264698.
%K nonn
%O 1,2
%A _R. H. Hardin_, Nov 21 2015