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A204500 Number of (n+2)X9 0..2 arrays with every 3X3 subblock having three strictly increasing elements in a row horizontally or vertically 1
8067170432, 66134172894, 379274173335, 3197724403266, 23772717607473, 286595565957180, 2150256810788631, 21212674520269086, 420794716153646061, 3180342417115503879, 27970972276407996771, 482602507408771603245 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 7 of A204501

LINKS

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

EXAMPLE

Some solutions for n=3

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

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

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

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

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

CROSSREFS

Sequence in context: A075131 A250865 A108880 * A290539 A017003 A017075

Adjacent sequences:  A204497 A204498 A204499 * A204501 A204502 A204503

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 15 2012

STATUS

approved

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Last modified November 15 13:47 EST 2019. Contains 329149 sequences. (Running on oeis4.)