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

%I #3 Nov 20 2015 07:26:15

%S 1,3,8,38,223,2412,26400,371328,5636096,92242944,2278149120,

%T 57145347072,1607327566848,49562666560512

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

%C Column 2 of A264659.

%e Some solutions for n=5

%e ..0..5....5..1....6..5....0..1....0..5....6..0....0..5....0..2....6..5....5..7

%e ..2..1....0..6....2..0....5..7....1..7....1..5....6..8....5..7....8..0....0..8

%e ..8..6....3..7....7..1....6..2....6..3....7..3....1..3....1..3....3..1....1..3

%e ..9..7....8..2....8..4....4..8....2..8....2..8....2..4....6..8....9..7....6..4

%e ..4..3....4..9....3..9....9..3....4..9....4..9....7..9....4..9....4..2....2..9

%Y Cf. A264659.

%K nonn

%O 1,2

%A _R. H. Hardin_, Nov 20 2015

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Last modified December 7 18:28 EST 2023. Contains 367660 sequences. (Running on oeis4.)