

A216025


Number of horizontal, vertical and diagonal neighbor colorings of the odd squares of an nX2 array with new integer colors introduced in row major order


2



1, 2, 2, 5, 12, 42, 136, 602, 2440, 12840, 61912, 373780, 2075312, 14050312, 87852160, 656404264, 4548247264, 37060650272, 281121815712, 2475181138384, 20358402201792, 192262536609952, 1701534399324544, 17131843186425504
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OFFSET

1,2


COMMENTS

Column 2 of A216031


LINKS

R. H. Hardin, Table of n, a(n) for n = 1..123


EXAMPLE

Some solutions for n=5
..x..0....x..0....x..0....x..0....x..0....x..0....x..0....x..0....x..0....x..0
..1..x....0..x....1..x....0..x....1..x....1..x....0..x....0..x....1..x....1..x
..x..2....x..1....x..2....x..1....x..2....x..2....x..1....x..1....x..2....x..2
..0..x....2..x....2..x....2..x....2..x....3..x....1..x....1..x....3..x....3..x
..x..3....x..0....x..0....x..3....x..3....x..4....x..0....x..2....x..1....x..0


CROSSREFS

Sequence in context: A181354 A085289 A095339 * A209476 A209178 A209720
Adjacent sequences: A216022 A216023 A216024 * A216026 A216027 A216028


KEYWORD

nonn


AUTHOR

R. H. Hardin Aug 30 2012


STATUS

approved



