A234386 Number of (6+2) X (n+2) 0..2 arrays with no increasing sequence of length 3 vertically, diagonally downwards or antidiagonally downwards.

90202925160, 290807719744802, 955881551862891819, 3160465819880176888222, 10447885769285657943599812, 34526335226027559659871647183, 114093615616643028027744872931828, 377033181043858375482709232096984175, 1245948123939354899379084920605773972487

Offset

1,1

Links

R. H. Hardin, Table of n, a(n) for n = 1..13

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

Crossrefs

Row 6 of A234380.

Sequence in context: A045519 A283459 A153433 * A015417 A217468 A234052

Adjacent sequences: A234383 A234384 A234385 * A234387 A234388 A234389

Keyword

nonn

Author

R. H. Hardin, Dec 25 2013

Extensions

Name corrected by Andrew Howroyd, Mar 20 2025

Status

approved