A201536 Number of nX5 0..2 arrays with rows and columns lexicographically nondecreasing and every element equal to at least one horizontal or vertical neighbor

9, 175, 3354, 91425, 2446147, 61807736, 1408677515, 28646055184, 523398227137, 8686880778087, 132361720458239, 1868645862989467, 24631940812325029, 305098771555173655, 3569810381726216867, 39630824798203404663

Offset

1,1

Comments

Column 5 of A201539

Links

R. H. Hardin, Table of n, a(n) for n = 1..160

Example

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

Crossrefs

Sequence in context: A305465 A027956 A003280 * A141359 A141363 A157774

Adjacent sequences: A201533 A201534 A201535 * A201537 A201538 A201539

Keyword

nonn

Author

R. H. Hardin Dec 02 2011

Status

approved