A203189 Number of nX6 0..4 arrays with every nonzero element less than or equal to some horizontal or vertical neighbor.

1121, 15703631, 117061422325, 754868206701309, 5067952959051283059, 34353493702738177260748, 232103745979086439437076471, 1567267224439734346152398392389, 10585441536020941283010401910808799

Offset

1,1

Comments

Column 6 of A203191

Links

R. H. Hardin, Table of n, a(n) for n = 1..65

Example

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

Crossrefs

Sequence in context: A207234 A207227 A207014 * A317962 A334963 A327431

Adjacent sequences: A203186 A203187 A203188 * A203190 A203191 A203192

Keyword

nonn

Author

R. H. Hardin, Dec 30 2011

Status

approved