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A221227 Number of nX3 arrays of occupancy after each element moves to some king-move neighbor, with no occupancy greater than 2 1
2, 137, 2710, 65453, 1516877, 35691850, 840634931, 19825968683, 467700681922, 11033979463946, 260310036348836, 6141004253501805, 144870026550523656, 3417517033348984137, 80619091513823917355, 1901786313951533118427 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 3 of A221229

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..24

EXAMPLE

Some solutions for n=3

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

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

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

CROSSREFS

Sequence in context: A000662 A139907 A195379 * A087619 A157072 A051029

Adjacent sequences:  A221224 A221225 A221226 * A221228 A221229 A221230

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 05 2013

STATUS

approved

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Last modified November 14 19:07 EST 2018. Contains 317214 sequences. (Running on oeis4.)