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A221338
Number of nX2 arrays of occupancy after each element moves to some king-move neighbor, with no 2-loops and with no occupancy greater than 2
1
0, 13, 85, 758, 5736, 44186, 335511, 2551999, 19387680, 147314684, 1119227588, 8503470301, 64605367209, 490840923878, 3729168338072, 28332370303954, 215255161696051, 1635400433430595, 12424947349080184, 94398470191658900
OFFSET
1,2
COMMENTS
Column 2 of A221341
LINKS
FORMULA
Empirical: a(n) = 17*a(n-1) -96*a(n-2) +174*a(n-3) +255*a(n-4) -1452*a(n-5) +1878*a(n-6) +67*a(n-7) -2335*a(n-8) +1974*a(n-9) -508*a(n-10)
EXAMPLE
Some solutions for n=3
..0..1....0..1....0..0....0..1....2..1....0..0....1..0....1..1....0..1....0..2
..2..1....2..1....1..2....1..2....2..1....2..2....2..1....2..1....2..0....1..2
..2..0....1..1....1..2....2..0....0..0....2..0....1..1....0..1....1..2....0..1
CROSSREFS
Sequence in context: A296647 A233325 A003764 * A322720 A082036 A037060
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 11 2013
STATUS
approved