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A221203 Number of 4Xn arrays of occupancy after each element moves to some horizontal, diagonal or antidiagonal neighbor, with no occupancy greater than 2 1
0, 289, 212, 427716, 4984812, 1026177156, 30374196832, 3043294206016, 133567666236732, 10038761087929924, 525060302368983108, 34891927404610766400, 1974298747702764055248, 124298442666315631470276 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Row 4 of A221200

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..15

EXAMPLE

Some solutions for n=3

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

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

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

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

CROSSREFS

Sequence in context: A306651 A272164 A107739 * A188367 A184046 A235810

Adjacent sequences:  A221200 A221201 A221202 * A221204 A221205 A221206

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 04 2013

STATUS

approved

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Last modified October 15 10:46 EDT 2019. Contains 328026 sequences. (Running on oeis4.)