A234376 Number of (n+2) X (3+2) 0..2 arrays with no increasing sequence of length 3 vertically, diagonally downwards or antidiagonally downwards.

9995040, 1622352843, 254778511950, 39700991817357, 6163727050266589, 955881551862891819, 148173779412346310679, 22965436234328704470793, 3559211361106337764001191, 551600384771107147241312565, 85485461756235600329519155580, 13248261593684338466369986208234

Offset

1,1

Links

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

Example

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

Crossrefs

Column 3 of A234380.

Sequence in context: A107617 A234980 A179737 * A003809 A003802 A033425

Adjacent sequences: A234373 A234374 A234375 * A234377 A234378 A234379

Keyword

nonn

Author

R. H. Hardin, Dec 25 2013

Extensions

Name corrected by Andrew Howroyd, Mar 20 2025

Status

approved