A250525 Number of (n+1)X(6+1) 0..2 arrays with nondecreasing x(i,j)-x(i,j-1) in the i direction and nondecreasing x(i,j)-x(i-1,j) in the j direction

35064, 214812, 896191, 3088923, 9580060, 27910024, 78204775, 213775147, 575554760, 1537251580, 4096973351, 10948193747, 29449843532, 79976028008, 219684249567, 610918710611, 1719898743144, 4898224161036, 14095078529871

Offset

1,1

Comments

Column 6 of A250527

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Formula

Empirical: a(n) = 14*a(n-1) -85*a(n-2) +294*a(n-3) -639*a(n-4) +906*a(n-5) -839*a(n-6) +490*a(n-7) -164*a(n-8) +24*a(n-9)

Example

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

Crossrefs

Sequence in context: A233631 A281886 A031835 * A251063 A234988 A075831

Adjacent sequences: A250522 A250523 A250524 * A250526 A250527 A250528

Keyword

nonn

Author

R. H. Hardin, Nov 24 2014

Status

approved