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A221766 Number of nX5 arrays of occupancy after each element moves to some horizontal or vertical neighbor, without 2-loops or left turns 1
0, 21, 536, 12177, 296912, 7115200, 170234678, 4073986651, 97465620298, 2331545530294, 55772599075464, 1334104002498388, 31912076109370226, 763341593404141513, 18259216025036326102, 436762191877943225707 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 5 of A221768

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..22

EXAMPLE

Some solutions for n=3

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

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

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

CROSSREFS

Sequence in context: A129993 A209348 A095655 * A080483 A015255 A034789

Adjacent sequences:  A221763 A221764 A221765 * A221767 A221768 A221769

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 25 2013

STATUS

approved

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Last modified October 24 12:04 EDT 2021. Contains 348225 sequences. (Running on oeis4.)