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A221786 Number of nX7 arrays of occupancy after each element moves to some horizontal or antidiagonal neighbor, without 2-loops or left turns 0
0, 55, 840, 15936, 252538, 4781652, 76353254, 1402260000, 23429257696 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 7 of A221787

LINKS

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

EXAMPLE

Some solutions for n=3

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

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

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

CROSSREFS

Sequence in context: A053138 A027784 A297523 * A241634 A008402 A281073

Adjacent sequences:  A221783 A221784 A221785 * A221787 A221788 A221789

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 25 2013

STATUS

approved

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Last modified January 15 12:14 EST 2021. Contains 340187 sequences. (Running on oeis4.)