cp's OEIS Frontend

A264657 Number of nX2 arrays of permutations of 0..n*2-1 with rows nondecreasing modulo 2 and columns nondecreasing modulo 5.

%I A264657 #3 Nov 20 2015 07:26:15
%S A264657 1,3,8,38,223,2412,26400,371328,5636096,92242944,2278149120,
%T A264657 57145347072,1607327566848,49562666560512
%N A264657 Number of nX2 arrays of permutations of 0..n*2-1 with rows nondecreasing modulo 2 and columns nondecreasing modulo 5.
%C A264657 Column 2 of A264659.
%e A264657 Some solutions for n=5
%e A264657 ..0..5....5..1....6..5....0..1....0..5....6..0....0..5....0..2....6..5....5..7
%e A264657 ..2..1....0..6....2..0....5..7....1..7....1..5....6..8....5..7....8..0....0..8
%e A264657 ..8..6....3..7....7..1....6..2....6..3....7..3....1..3....1..3....3..1....1..3
%e A264657 ..9..7....8..2....8..4....4..8....2..8....2..8....2..4....6..8....9..7....6..4
%e A264657 ..4..3....4..9....3..9....9..3....4..9....4..9....7..9....4..9....4..2....2..9
%Y A264657 Cf. A264659.
%K A264657 nonn
%O A264657 1,2
%A A264657 _R. H. Hardin_, Nov 20 2015