cp's OEIS Frontend

A264726 Number of nX2 arrays of permutations of 0..n*2-1 with rows nondecreasing modulo 4 and columns nondecreasing modulo 6.

%I A264726 #4 Nov 22 2015 11:01:38
%S A264726 1,2,3,12,69,278,2524,27024,250688,3721984,56111104,835883008,
%T A264726 17920733184,437473529856,9120031211520,270263516958720
%N A264726 Number of nX2 arrays of permutations of 0..n*2-1 with rows nondecreasing modulo 4 and columns nondecreasing modulo 6.
%C A264726 Column 2 of A264728.
%e A264726 Some solutions for n=6
%e A264726 ..0..6....6..7....6..7....0..6....6..7....2..6....8..0....2..6....6..7....8..0
%e A264726 ..1..7....0..2....0..2....2..7....0..8....8..0....2..6....8..0....0..1....2..6
%e A264726 ..4..8....1..3....1..3....8..1....1..2....4..1....9..1....9..1....8..2....9..1
%e A264726 .10..2....8.10....8.10....9..3....9..3...10..7...10..7....4..7....9..3....4..7
%e A264726 ..5..9....9.11....9..5...10.11...10.11....5..9....4..3...11..3....4.10...11..3
%e A264726 .11..3....4..5....4.11....4..5....4..5...11..3....5.11....5.10....5.11....5.10
%Y A264726 Cf. A264728.
%K A264726 nonn
%O A264726 1,2
%A A264726 _R. H. Hardin_, Nov 22 2015