A186624 Number of (n+2)X5 0..2 arrays with 3X3 subblock sums nondecreasing rightwards and downwards.

5109075, 313250283, 19192412328, 1114156913743, 40638068592052, 1479413089672909, 53067946949076948, 1364942987805378749

Offset

1,1

Comments

Column 3 of A186625

Links

Table of n, a(n) for n=1..8.

Example

Some solutions for 4X5
..0..0..0..2..1....0..0..2..0..2....0..0..1..0..0....0..0..1..0..0
..0..0..1..1..2....0..0..0..2..1....0..0..0..0..1....0..0..0..2..2
..0..0..0..0..0....0..0..2..2..0....0..0..0..2..2....0..0..2..2..1
..0..0..0..2..2....0..0..2..2..2....0..0..2..0..1....0..0..1..2..2

Crossrefs

Sequence in context: A015363 A234785 A206136 * A157844 A263039 A241607

Adjacent sequences: A186621 A186622 A186623 * A186625 A186626 A186627

Keyword

nonn

Author

R. H. Hardin, Feb 24 2011

Status

approved