A233492 Number of (n+2) X (3+2) 0..2 arrays with no increasing sequence of length 3 horizontally or antidiagonally downwards.

8946936, 1709348346, 325881917874, 62127117326151, 11844001767009636, 2257956973020836034, 430460043429459971151, 82063498573383090200622, 15644698967819692026084375, 2982527068033093478348100960

Offset

1,1

Comments

Column 3 of A233497.

Links

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

Formula

Empirical: a(n) = 191*a(n-1) +134*a(n-2) -38637*a(n-3) +3177*a(n-4) +1502613*a(n-5) -3705102*a(n-6) +2380185*a(n-7).

Example

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

Crossrefs

Cf. A233497.

Sequence in context: A217655 A151933 A337964 * A251157 A337963 A234192

Adjacent sequences: A233489 A233490 A233491 * A233493 A233494 A233495

Keyword

nonn

Author

R. H. Hardin, Dec 11 2013

Status

approved