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A221774 Number of nX2 arrays of occupancy after each element stays put or moves to some king-move neighbor, without move-in move-out left turns 1
3, 35, 372, 3943, 41745, 441877, 4677106, 49504700, 523978608, 5546002679, 58701126836, 621316327261, 6576261708350, 69605796705162, 736735724582441, 7797906979453335, 82536181204107988, 873596110577329432 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 2 of A221776
LINKS
FORMULA
Empirical: a(n) = 19*a(n-1) -117*a(n-2) +338*a(n-3) -469*a(n-4) +191*a(n-5) +237*a(n-6) -183*a(n-7) -64*a(n-8) +14*a(n-9)
EXAMPLE
Some solutions for n=3
..1..1....0..2....0..3....2..0....0..1....1..0....2..0....0..0....2..1....2..2
..2..2....4..0....1..1....0..0....3..0....2..1....0..1....5..1....0..2....2..0
..0..0....0..0....1..0....3..1....2..0....2..0....0..3....0..0....0..1....0..0
CROSSREFS
Sequence in context: A260586 A089933 A086043 * A221687 A221223 A006767
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 25 2013
STATUS
approved

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Last modified June 13 05:35 EDT 2024. Contains 373366 sequences. (Running on oeis4.)