A201068 Number of nX4 0..6 arrays with every row and column nondecreasing rightwards and downwards, and the number of instances of each value within one of each other

35, 77, 2611, 22440, 43308, 1127514, 175865, 20393189, 14766300, 158314010, 495900141, 452698962, 6176064188, 493804760, 39573007249, 18657025428, 128820947525, 280570465208, 193035367346, 1994641001437, 119475251989

Offset

1,1

Comments

Column 4 of A201072

Links

R. H. Hardin, Table of n, a(n) for n = 1..33

Example

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

Crossrefs

Sequence in context: A257750 A257751 A259282 * A111144 A267555 A201632

Adjacent sequences: A201065 A201066 A201067 * A201069 A201070 A201071

Keyword

nonn

Author

R. H. Hardin Nov 26 2011

Status

approved