A233594 Number of (n+2)X(n+2) 0..2 arrays with no increasing sequence of length 3 horizontally, vertically or antidiagonally downwards

15272, 20463326, 193816724926, 13036676136198570, 6217400227849213336029, 21035300720988185135892977193, 504952565127306851299571097075003261, 86012703850284916544804503539506332380421824

Offset

1,1

Comments

Diagonal of A233602

Links

Table of n, a(n) for n=1..8.

Example

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

Crossrefs

Sequence in context: A233602 A233603 A233595 * A064982 A204317 A216945

Adjacent sequences: A233591 A233592 A233593 * A233595 A233596 A233597

Keyword

nonn

Author

R. H. Hardin, Dec 14 2013

Status

approved