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A220964
Equals one maps: number of nX2 binary arrays indicating the locations of corresponding elements equal to exactly one of their king-move neighbors in a random 0..2 nX2 array
1
2, 8, 40, 176, 744, 3144, 13128, 54424, 224120, 918688, 3750192, 15259608, 61920992, 250704984, 1013136464, 4087826848, 16471855680, 66299538792, 266606574816, 1071240609992, 4301416806848, 17261909388320, 69239867965712
OFFSET
1,1
COMMENTS
Column 2 of A220967
LINKS
FORMULA
Empirical: a(n) = 6*a(n-1) -3*a(n-2) -22*a(n-3) +15*a(n-4) -36*a(n-5) +36*a(n-6) -16*a(n-7) +4*a(n-8) -8*a(n-9) -40*a(n-10) +32*a(n-11) +4*a(n-12) -16*a(n-13)
EXAMPLE
Some solutions for n=3
..0..0....1..1....0..1....0..1....0..1....1..0....0..1....1..0....0..0....1..1
..0..0....0..1....1..1....0..0....1..1....0..0....1..0....0..1....0..0....1..0
..0..0....0..0....1..0....0..0....0..1....1..0....1..1....0..0....0..1....1..0
CROSSREFS
Sequence in context: A074092 A003445 A181326 * A231125 A221587 A186947
KEYWORD
nonn
AUTHOR
R. H. Hardin Dec 27 2012
STATUS
approved