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Number of nX2 arrays of permutations of 0..n*2-1 with rows nondecreasing modulo 4 and columns nondecreasing modulo 7.
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%I #4 Nov 26 2015 07:05:40

%S 1,2,3,7,27,84,533,5474,53085,404277,4881327,64681840,821227056,

%T 9483498992,205857814704,4404636345376

%N Number of nX2 arrays of permutations of 0..n*2-1 with rows nondecreasing modulo 4 and columns nondecreasing modulo 7.

%C Column 2 of A264831.

%e All solutions for n=4

%e ..3..7....1..7....0..2....0..7....7..3....2..7....0..7

%e ..4..0....4..0....7..3....4..1....0..4....4..0....1..2

%e ..5..1....5..2....1..5....5..2....1..5....5..1....4..3

%e ..6..2....6..3....4..6....6..3....2..6....6..3....5..6

%Y Cf. A264831.

%K nonn

%O 1,2

%A _R. H. Hardin_, Nov 26 2015