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A221204 Number of 5Xn arrays of occupancy after each element moves to some horizontal, diagonal or antidiagonal neighbor, with no occupancy greater than 2 0
0, 1681, 976, 20277009, 433687328, 420771471561, 29037336149952, 10986555692499984 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Row 5 of A221200

LINKS

Table of n, a(n) for n=1..8.

EXAMPLE

Some solutions for n=3

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

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

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

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

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

CROSSREFS

Sequence in context: A172673 A172768 A172667 * A145292 A228183 A175897

Adjacent sequences:  A221201 A221202 A221203 * A221205 A221206 A221207

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 04 2013

STATUS

approved

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Last modified April 25 21:06 EDT 2019. Contains 322461 sequences. (Running on oeis4.)