A233493 Number of (n+2) X (4+2) 0..2 arrays with no increasing sequence of length 3 horizontally or antidiagonally downwards.

205862149, 108934667695, 57417306351598, 30258000792128359, 15945021790711870267, 8402516744270059192510, 4427856941758752650124295, 2333338629541317978393143944, 1229594638242708728348131570618

Offset

1,1

Comments

Column 4 of A233497.

Links

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

Example

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

Crossrefs

Cf. A233497.

Sequence in context: A226079 A034641 A288088 * A187440 A092379 A233614

Adjacent sequences: A233490 A233491 A233492 * A233494 A233495 A233496

Keyword

nonn

Author

R. H. Hardin, Dec 11 2013

Status

approved