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%I #4 Nov 19 2015 13:52:43
%S 1,1,6,30,284,2344,31632,492432,12098624,236007424,6065647616,
%T 159458086912,6086725226496,260007588237312
%N Number of nX2 arrays of permutations of 0..n*2-1 with rows nondecreasing modulo 3 and columns nondecreasing modulo 4.
%C Column 2 of A264643.
%e Some solutions for n=4
%e ..1..4....4..1....0..5....0..5....0..1....0..4....0..1....0..4....4..1....4..5
%e ..6..0....0..5....4..1....4..2....4..5....2..5....4..5....1..5....0..6....0..2
%e ..2..5....7..2....3..6....1..7....3..6....6..1....7..2....7..2....5..2....1..7
%e ..3..7....3..6....7..2....6..3....7..2....3..7....3..6....3..6....3..7....6..3
%Y Cf. A264643.
%K nonn
%O 1,3
%A _R. H. Hardin_, Nov 19 2015
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