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A221785 Number of nX6 arrays of occupancy after each element moves to some horizontal or antidiagonal neighbor, without 2-loops or left turns 0
0, 21, 142, 1325, 13682, 109702, 1104476, 9561346, 89663745 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 6 of A221787

LINKS

Table of n, a(n) for n=1..9.

EXAMPLE

Some solutions for n=3

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

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

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

CROSSREFS

Sequence in context: A200987 A107731 A003702 * A301866 A101645 A230692

Adjacent sequences:  A221782 A221783 A221784 * A221786 A221787 A221788

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 25 2013

STATUS

approved

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Last modified January 20 21:49 EST 2021. Contains 340332 sequences. (Running on oeis4.)