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A221109 Number of n X n arrays of occupancy after each element moves to some horizontal or antidiagonal neighbor, without 2-loops 0
0, 0, 8, 3706, 11678172, 326416281638, 82293038769560932 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

Diagonal of A221114

LINKS

Table of n, a(n) for n=1..7.

EXAMPLE

Some solutions for n=3

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

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

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

CROSSREFS

Sequence in context: A295170 A087925 A125540 * A221243 A351409 A024113

Adjacent sequences:  A221106 A221107 A221108 * A221110 A221111 A221112

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 02 2013

STATUS

approved

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Last modified May 20 03:37 EDT 2022. Contains 353851 sequences. (Running on oeis4.)