A269032 Number of nX5 0..2 arrays with some element plus some horizontally, diagonally or antidiagonally adjacent neighbor totalling two exactly once.

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

R. H. Hardin, Table of n, a(n) for n = 1..210

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

Adjacent sequences: A269029 A269030 A269031 * A269033 A269034 A269035

Keyword

nonn

Author

R. H. Hardin, Feb 18 2016

Status

approved