

A204535


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


1



9043, 212290, 5430396, 87110239, 1851793487, 42694542185, 825548834273, 17195503706340, 371722319290833, 7585311372018021, 157816886614165794, 3332535960609074800, 69088335337556239245, 1439162071333884941158
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OFFSET

1,1


COMMENTS

Column 2 of A204538


LINKS

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


EXAMPLE

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


CROSSREFS

Sequence in context: A128374 A210179 A161610 * A345389 A202914 A252443
Adjacent sequences: A204532 A204533 A204534 * A204536 A204537 A204538


KEYWORD

nonn


AUTHOR

R. H. Hardin Jan 16 2012


STATUS

approved



