cp's OEIS Frontend

A264690 Number of nX2 arrays of permutations of 0..n*2-1 with rows nondecreasing modulo 3 and columns nondecreasing modulo 5.

%I A264690 #4 Nov 21 2015 07:29:53
%S A264690 1,1,6,23,84,897,9292,98776,1380544,20573376,451512320,8653964800,
%T A264690 238280574976,6409517629440,172949221113856
%N A264690 Number of nX2 arrays of permutations of 0..n*2-1 with rows nondecreasing modulo 3 and columns nondecreasing modulo 5.
%C A264690 Column 2 of A264692.
%e A264690 Some solutions for n=6
%e A264690 ..0..5....0..5....5.11....0..5....0..1....0..1....0..5....6.10...10..1....0..5
%e A264690 .10.11....1.10...10..7....6.10....5.11....5.11....6.10....1..5....5.11....6.10
%e A264690 ..6..2....8.11....0..2....7..1...10..2...10..2....1.11....3..0....0..6....1.11
%e A264690 ..1..7....3..6....1..8....2.11....6..7....6..7....3..7....8.11....8..2....7..2
%e A264690 ..3..8....4..7....6..3....4..8....9..3....3..8....8..2....9..7....4..7....4..8
%e A264690 ..9..4....9..2....9..4....9..3....4..8....9..4....9..4....4..2....9..3....9..3
%Y A264690 Cf. A264692.
%K A264690 nonn
%O A264690 1,3
%A A264690 _R. H. Hardin_, Nov 21 2015