A220317 Equals two maps: number of nX3 binary arrays indicating the locations of corresponding elements equal to exactly two of their king-move neighbors in a random 0..2 nX3 array

2, 24, 353, 3167, 28215, 237144, 1944692, 15735116, 126513306, 1014237718, 8120891182, 64989221681, 519982144806, 4160063431147

Offset

1,1

Comments

Column 3 of A220319

Links

Table of n, a(n) for n=1..14.

Example

Some solutions for n=3
..0..1..0....0..0..0....1..1..1....1..0..0....1..1..0....0..1..1....0..0..0
..0..1..1....1..1..1....0..1..1....0..0..0....1..1..0....1..0..0....0..0..1
..0..0..1....0..1..0....0..0..0....1..0..1....1..0..1....0..1..0....1..0..0

Crossrefs

Sequence in context: A081065 A262291 A043699 * A220340 A366003 A134805

Adjacent sequences: A220314 A220315 A220316 * A220318 A220319 A220320

Keyword

nonn

Author

R. H. Hardin Dec 10 2012

Status

approved