A265492 Number of nX6 0..n*6-1 arrays with upper left zero and lower right n*6-1 and each element differing from its horizontal, vertical and diagonal neighbors by a power of two.

79, 0, 2506, 3249, 0, 7928582, 223328748, 0, 1549060833483, 39333115954893, 0, 2109288411348207682, 326185610259705685656, 0, 3328201162998337468944458, 312377463730842740280530334, 0, 2511537812294356287514629641154

Offset

1,1

Comments

Column 6 of A265494.

Links

Table of n, a(n) for n=1..18.

Example

Some solutions for n=4
..0.16.14.12.13.11....0.16.14.15.13.11....0.16.14.15.19.23....0.16.14.15.19.20
.16..8.12.13.11..9....4..8.12.13.11.15...16..8.12.13.11.15....4..8.12.13.17.18
..8.12.10.11.15..7....8.12.10.11.15.19...14.12.10.11.15.19....8.12.10.11.15.19
..6..4..8..9..7.23....0.16..8..9..7.23...12.16..8..9..7.23....6..4..8..9..7.23

Crossrefs

Cf. A265494.

Sequence in context: A093239 A299713 A064991 * A051326 A033399 A272639

Adjacent sequences: A265489 A265490 A265491 * A265493 A265494 A265495

Keyword

nonn

Author

R. H. Hardin, Dec 09 2015

Status

approved