

A204742


Number of (n+2)X4 0..2 arrays with every 3X3 subblock having three equal elements in a row horizontally, vertically, diagonally or antidiagonally exactly one way, and new values 0..2 introduced in row major order


1



17835, 352950, 7146451, 141179471, 2839352529, 57762265633, 1169004717315, 23699614326315, 481694347006804, 9783482284673750, 198709861019246962, 4037924969719681164, 82048520869992751650, 1667108979331825321864
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OFFSET

1,1


COMMENTS

Column 2 of A204745


LINKS

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


EXAMPLE

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


CROSSREFS

Sequence in context: A203920 A236649 A054472 * A235782 A235787 A235563
Adjacent sequences: A204739 A204740 A204741 * A204743 A204744 A204745


KEYWORD

nonn


AUTHOR

R. H. Hardin Jan 18 2012


STATUS

approved



