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A221406 Number of nX5 arrays of occupancy after each element stays put or moves to some horizontal or vertical neighbor, with every occupancy equal to zero or two 1
0, 120, 0, 47156, 0, 18852560, 0, 7505597654, 0, 2984164922226, 0, 1185951960926210, 0, 471249297474390114, 0, 187247029623260170674, 0, 74400007192624944055794, 0, 29561675588644660921885852, 0 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 5 of A221408

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..28

EXAMPLE

Some solutions for n=4

..2..0..2..2..2....0..2..0..2..2....2..0..2..2..2....2..0..0..2..2

..0..0..2..0..0....0..2..0..2..0....0..0..0..2..0....0..2..0..0..2

..2..0..0..0..2....0..0..0..2..0....0..2..0..2..0....2..0..2..2..0

..2..0..2..0..2....2..2..2..2..0....2..0..2..2..0....2..0..0..0..2

CROSSREFS

Sequence in context: A073836 A242836 A229031 * A267428 A156739 A326798

Adjacent sequences:  A221403 A221404 A221405 * A221407 A221408 A221409

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 15 2013

STATUS

approved

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Last modified June 14 05:51 EDT 2021. Contains 345018 sequences. (Running on oeis4.)