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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 1
3971, 339311, 18296109, 2046727035, 208673819127, 16952599195335, 2150256810788631, 231484563516049047, 17383011406345706229, 2392589916423772309863, 241662368869335696335157 (list; graph; refs; listen; history; text; internal format)
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

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Last modified January 21 22:08 EST 2022. Contains 350480 sequences. (Running on oeis4.)