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A269032
Number of nX5 0..2 arrays with some element plus some horizontally, diagonally or antidiagonally adjacent neighbor totalling two exactly once.
1
96, 672, 9528, 115656, 1326576, 14710368, 159397596, 1698064656, 17853542544, 185754411168, 1916112393912, 19623814814640, 199755193119372, 2022721445384448, 20388967766219208, 204700225563136152
OFFSET
1,1
COMMENTS
Column 5 of A269035.
LINKS
FORMULA
Empirical: a(n) = 28*a(n-1) -286*a(n-2) +1290*a(n-3) -2373*a(n-4) +304*a(n-5) +3551*a(n-6) -2846*a(n-7) -546*a(n-8) +1308*a(n-9) -505*a(n-10) +76*a(n-11) -4*a(n-12) for n>13
EXAMPLE
Some solutions for n=4
..2..0..1..0..0. .0..1..2..1..0. .0..0..0..0..1. .2..1..2..2..1
..1..2..1..0..1. .2..1..2..1..2. .1..0..0..0..0. .2..1..2..1..2
..1..0..1..2..1. .2..1..2..1..0. .0..0..0..0..1. .0..1..2..2..2
..0..0..1..2..2. .0..2..2..1..2. .0..0..0..1..0. .0..1..2..2..2
CROSSREFS
Cf. A269035.
Sequence in context: A216106 A268795 A232405 * A187610 A269215 A096783
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 18 2016
STATUS
approved