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A204476 Number of (n+2)X(n+2) 0..3 arrays with every 3X3 subblock having three equal elements in a row horizontally, vertically or nw-to-se diagonally exactly three ways, and new values 0..3 introduced in row major order 0
80, 1326, 608, 1482, 6494, 18410, 66580, 265906, 948920, 3573030, 13667010 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A204483

LINKS

Table of n, a(n) for n=1..11.

EXAMPLE

Some solutions for n=3

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

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

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

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

..2..1..1..2..0....1..0..2..2..2....0..0..0..0..0....3..1..1..2..1

CROSSREFS

Sequence in context: A296353 A126861 A038727 * A151603 A199533 A333075

Adjacent sequences:  A204473 A204474 A204475 * A204477 A204478 A204479

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 15 2012

STATUS

approved

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Last modified August 13 06:22 EDT 2020. Contains 336442 sequences. (Running on oeis4.)