A200852 Number of nX2 0..4 arrays with every row and column running average nondecreasing rightwards and downwards

15, 105, 647, 3728, 20656, 111222, 586908, 3047226, 15620118, 79228317, 398364306, 1988133262, 9858922561, 48617189158, 238575216150, 1165684780558, 5673701149975, 27520684819357, 133080240201400, 641746039540686

Offset

1,1

Comments

Column 2 of A200858

Links

R. H. Hardin, Table of n, a(n) for n = 1..140

Example

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

Crossrefs

Sequence in context: A000478 A055848 A202493 * A266503 A058085 A060218

Adjacent sequences: A200849 A200850 A200851 * A200853 A200854 A200855

Keyword

nonn

Author

R. H. Hardin Nov 23 2011

Status

approved