A233797 Number of (n+2) X (2+2) 0..3 arrays with no increasing sequence of length 3 horizontally, vertically or antidiagonally downwards.

7949773, 1231134446, 184701585960, 27653665556487, 4128363478149117, 616170589022493877, 91941352219976949775, 13718603645716931922312, 2046910445128969814115728, 305412394098009944938215077

Offset

1,1

Comments

Column 2 of A233801.

Links

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

Example

Some solutions for n=1
..0..0..2..0....0..1..0..1....0..1..1..1....0..0..0..0....0..0..0..1
..0..0..0..1....1..0..0..0....0..2..2..0....0..2..2..3....1..3..1..1
..1..1..3..1....0..0..0..3....1..0..0..3....1..0..2..1....1..0..0..0

Crossrefs

Cf. A233801.

Sequence in context: A346029 A237338 A360905 * A203504 A233803 A204970

Adjacent sequences: A233794 A233795 A233796 * A233798 A233799 A233800

Keyword

nonn

Author

R. H. Hardin, Dec 16 2013

Status

approved