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%I #3 Nov 21 2015 08:07:04
%S 1,3,15,212,3712,96256,3423168,158521536,8362014912,635861560320,
%T 51551078842368
%N Number of 2Xn arrays of permutations of 0..n*2-1 with rows nondecreasing modulo 2 and columns nondecreasing modulo 6.
%C Row 2 of A264704.
%e Some solutions for n=6
%e ..2..0..8.10..7..1....8..0..6..1..7..3....0..6..4..3..9..7....4..6..8..0..7..9
%e ..4..6..9.11..5..3....4.10..2..5.11..9....8..2.10..5.11..1...10..2.11..5..1..3
%Y Cf. A264704.
%K nonn
%O 1,2
%A _R. H. Hardin_, Nov 21 2015