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A221203 Number of 4 X n 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
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
Cf. A221200.
Sequence in context: A306651 A272164 A107739 * A188367 A184046 A235810
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 04 2013
STATUS
approved

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Last modified March 29 05:48 EDT 2024. Contains 371265 sequences. (Running on oeis4.)