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A204286 Number of (n+2)X4 0..3 arrays with every 3X3 subblock having three equal elements in a row horizontally, vertically, diagonally or antidiagonally exactly two different ways, and new values 0..3 introduced in row major order 1
9747, 190347, 4225471, 69321821, 1350148902, 27980729421, 524910976410, 10254308165044, 204323923920303, 3952888500512569, 77312665141597838, 1521497665634852978, 29682765725895741308, 580820702897175020144 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A204289

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..171

EXAMPLE

Some solutions for n=3

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

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

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

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

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

CROSSREFS

Sequence in context: A206631 A031860 A023687 * A242878 A247696 A010092

Adjacent sequences:  A204283 A204284 A204285 * A204287 A204288 A204289

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 13 2012

STATUS

approved

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Last modified November 26 09:38 EST 2020. Contains 338639 sequences. (Running on oeis4.)