A234379 Number of (n+2) X (6+2) 0..2 arrays with no increasing sequence of length 3 vertically, diagonally downwards or antidiagonally downwards.

148657436928, 472916732993424, 1408249830518808876, 4119486037640399438233, 11944486723702109384665943, 34526335226027559659871647183, 99669162423651067249364771118789, 287576266403190867326809036781879073, 829576686543007526583118396952018747893

Offset

1,1

Links

R. H. Hardin, Table of n, a(n) for n = 1..18

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
..0..0..0..0..0..0..1..0....0..0..0..0..0..2..0..2....0..0..0..0..0..0..1..2
..0..0..0..0..1..0..1..0....2..1..1..0..0..0..1..1....2..1..1..1..1..0..0..0

Crossrefs

Column 6 of A234380.

Sequence in context: A320722 A186177 A104832 * A290157 A288283 A271819

Adjacent sequences: A234376 A234377 A234378 * A234380 A234381 A234382

Keyword

nonn

Author

R. H. Hardin, Dec 25 2013

Extensions

Name corrected by Andrew Howroyd, Mar 20 2025

Status

approved