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A217342 Number of nX4 arrays of occupancy after each element moves to some horizontal or vertical neighbor but without 2-loops 1
0, 38, 2389, 120908, 5756974, 267947653, 12350550690, 566789163488, 25958450760849, 1187754678765443, 54322924296499637, 2483989094275943631, 113572728843260660640, 5192525516036292143928, 237396286736491907178433 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 4 of A217346

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..43

EXAMPLE

Some solutions for n=3

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

..2..2..3..1....1..0..2..2....1..2..2..2....1..0..1..0....1..0..2..1

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

CROSSREFS

Sequence in context: A217224 A272036 A055605 * A319519 A221111 A322331

Adjacent sequences:  A217339 A217340 A217341 * A217343 A217344 A217345

KEYWORD

nonn

AUTHOR

R. H. Hardin Oct 01 2012

STATUS

approved

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Last modified January 23 23:01 EST 2022. Contains 350515 sequences. (Running on oeis4.)