A265616 Number of nX3 0..n*3-1 arrays with upper left zero and lower right n*3-1 and each element differing from its horizontal and diagonal neighbors by a power of two.

1, 64, 5625, 545952, 147336019, 54825790582, 25237215601657, 5398176185968548, 2317847898908866544, 635566504276200616510, 305266363265075079477151, 143131715470675197060853750, 73823000812542741031803846419

Offset

1,2

Comments

Column 3 of A265619.

Links

R. H. Hardin, Table of n, a(n) for n = 1..102

Example

Some solutions for n=3
..0..4..3....0..4..6....0..4..3....0..4..8....0..4..3....0..4..2....0..2..0
..8..4..0....3..4..3....2..4..0....6..4..3....8..4..6....5..4..2....5..4..0
..8..6..8....5..7..8....6..4..8....3..7..8....3..4..8....2..6..8....8..6..8

Crossrefs

Cf. A265619.

Sequence in context: A326104 A300810 A301449 * A321207 A281954 A316182

Adjacent sequences: A265613 A265614 A265615 * A265617 A265618 A265619

Keyword

nonn

Author

R. H. Hardin, Dec 10 2015

Status

approved