cp's OEIS Frontend

A264641 Number of nX2 arrays of permutations of 0..n*2-1 with rows nondecreasing modulo 3 and columns nondecreasing modulo 4.

%I A264641 #4 Nov 19 2015 13:52:43
%S A264641 1,1,6,30,284,2344,31632,492432,12098624,236007424,6065647616,
%T A264641 159458086912,6086725226496,260007588237312
%N A264641 Number of nX2 arrays of permutations of 0..n*2-1 with rows nondecreasing modulo 3 and columns nondecreasing modulo 4.
%C A264641 Column 2 of A264643.
%e A264641 Some solutions for n=4
%e A264641 ..1..4....4..1....0..5....0..5....0..1....0..4....0..1....0..4....4..1....4..5
%e A264641 ..6..0....0..5....4..1....4..2....4..5....2..5....4..5....1..5....0..6....0..2
%e A264641 ..2..5....7..2....3..6....1..7....3..6....6..1....7..2....7..2....5..2....1..7
%e A264641 ..3..7....3..6....7..2....6..3....7..2....3..7....3..6....3..6....3..7....6..3
%Y A264641 Cf. A264643.
%K A264641 nonn
%O A264641 1,3
%A A264641 _R. H. Hardin_, Nov 19 2015