A264829 Number of nX2 arrays of permutations of 0..n*2-1 with rows nondecreasing modulo 4 and columns nondecreasing modulo 7.

1, 2, 3, 7, 27, 84, 533, 5474, 53085, 404277, 4881327, 64681840, 821227056, 9483498992, 205857814704, 4404636345376

Offset

1,2

Comments

Column 2 of A264831.

Links

Table of n, a(n) for n=1..16.

Example

All solutions for n=4
..3..7....1..7....0..2....0..7....7..3....2..7....0..7
..4..0....4..0....7..3....4..1....0..4....4..0....1..2
..5..1....5..2....1..5....5..2....1..5....5..1....4..3
..6..2....6..3....4..6....6..3....2..6....6..3....5..6

Crossrefs

Cf. A264831.

Sequence in context: A107881 A371161 A128001 * A156142 A052877 A137075

Adjacent sequences: A264826 A264827 A264828 * A264830 A264831 A264832

Keyword

nonn

Author

R. H. Hardin, Nov 26 2015

Status

approved