A265489 - OEIS

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

(list; graph; refs; listen; history; text; internal format)

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