A185427 Number of (n+2)X3 0..7 arrays with each 3X3 subblock having rows and columns in lexicographically nondecreasing order

6842284, 284037544, 8653394212, 212298419684, 4370405405266, 77657199293322, 1216284173329482, 17062128865116751, 217083576402029968, 2530473438240068012, 27249849558442300355, 272981324157512302120

Offset

1,1

Comments

Column 1 of A185435

Links

R. H. Hardin, Table of n, a(n) for n = 1..200

R. H. Hardin, Formula: polynomial of degree 119

Formula

Polynomial of degree 119, see link

Example

Some solutions for 4X3
..0..0..0....0..0..0....0..0..0....0..0..0....0..0..0....0..0..0....0..0..0
..0..0..6....0..0..4....0..0..4....0..0..4....0..0..2....0..0..2....0..0..4
..0..4..4....2..7..3....2..6..1....2..4..4....0..4..2....0..7..2....2..5..6
..1..4..6....4..5..3....5..4..2....4..7..7....5..5..7....7..1..3....5..4..0

Crossrefs

Sequence in context: A079015 A372085 A185435 * A185426 A250457 A251982

Adjacent sequences: A185424 A185425 A185426 * A185428 A185429 A185430

Keyword

nonn

Author

R. H. Hardin Jan 27 2011

Status

approved