A265489 Number of n X 3 0..n*3-1 arrays with upper left zero and lower right n*3-1 and each element differing from its horizontal, vertical and diagonal neighbors by a power of two.

1, 0, 36, 0, 0, 2506, 294152, 0, 19516777, 83909226, 0, 10678005713, 545032909689, 0, 102275177508104, 395694498744634, 0, 81469369938066316, 2375486573786293387, 0, 404350295447676882458, 3081651598084594364137, 0

Offset

1,3

Comments

Column 3 of A265494.

Links

R. H. Hardin, Table of n, a(n) for n = 1..135

Example

Some solutions for n=6
..0..2.10....0..8..4....0..2..4....0..8..4....0..2.10....0..8.10....0..8.10
..2..4..6....8.16.12....8..4..0....8..4..0....2..4..6....8.16.12....8.16.12
..4..3..5...10.12..8...16.12..8....7..6..8....1..3..2...16.12..8...10.12.14
..3..5..7....9.11.10...15.14.16....9..5..7....9..5..1...15.14.16...12.11.10
..5..1..9...17.13..9...17.13.15...17.13..9...17.13..9...11.13.15...11.13..9
..1..9.17...13..9.17...13.15.17...13..9.17....1..9.17....7.15.17....7..9.17

Crossrefs

Cf. A265494.

Sequence in context: A010113 A167264 A292156 * A262795 A309379 A022071

Adjacent sequences: A265486 A265487 A265488 * A265490 A265491 A265492

Keyword

nonn

Author

R. H. Hardin, Dec 09 2015

Status

approved