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A221402 Number of 3Xn arrays of occupancy after each element moves to some horizontal, diagonal or antidiagonal neighbor, with no 2-loops and with no occupancy greater than 2 1
0, 7, 30, 2110, 26374, 681300, 11554698, 239213277, 4414861636, 86099730502, 1625526991148, 31160102911062, 591775127780270, 11285743215972044, 214648325661089776, 4087126318623042490, 77761170034232040294 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
Row 3 of A221400
LINKS
EXAMPLE
Some solutions for n=3
..1..2..0....0..2..0....0..2..0....1..2..0....1..2..0....0..2..1....0..2..0
..0..2..1....0..2..1....2..2..0....0..2..2....0..2..0....0..2..1....1..2..0
..0..2..1....1..2..1....1..2..0....0..2..0....1..2..1....0..2..1....1..2..1
CROSSREFS
Sequence in context: A196338 A196315 A156347 * A065916 A122654 A184121
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 15 2013
STATUS
approved

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Last modified March 3 00:46 EST 2024. Contains 370499 sequences. (Running on oeis4.)