A204493 Number of (n+2)X(n+2) 0..2 arrays with every 3X3 subblock having three strictly increasing elements in a row horizontally or vertically

3971, 339311, 18296109, 2046727035, 208673819127, 16952599195335, 2150256810788631, 231484563516049047, 17383011406345706229, 2392589916423772309863, 241662368869335696335157

Offset

1,1

Comments

Diagonal of A204501

Links

R. H. Hardin, Table of n, a(n) for n = 1..14

Example

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

Crossrefs

Sequence in context: A204501 A204494 A184492 * A321053 A233648 A186799

Adjacent sequences: A204490 A204491 A204492 * A204494 A204495 A204496

Keyword

nonn

Author

R. H. Hardin Jan 15 2012

Status

approved