A265632 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, diagonal and antidiagonal neighbors by a power of two.

1, 64, 2660, 35328, 5852058, 962138367, 498846580538, 14960802865507, 4130309844097522, 268900326021822223, 236947971476002244912, 8961761176387874932701, 1772674566449746258218428

Offset

1,2

Comments

Column 3 of A265635.

Links

R. H. Hardin, Table of n, a(n) for n = 1..128

Example

Some solutions for n=4
..0..8..0....0..4..2....0..4..5....0..1..5....0..2..3....0..4..0....0..1..5
..6..4..6....8..4..8....5..4..8....3..4..3....3..2..3....8..4..5....5..1..3
..5..7..5....5..7..6....8..7..5....8..7..5....6..7..6....3..7..3....5..7..3
..3..7.11....6..7.11....8..7.11....8..9.11...11.10.11....6..7.11....3..7.11

Crossrefs

Cf. A265635.

Sequence in context: A004388 A269291 A203256 * A144843 A284228 A017319

Adjacent sequences: A265629 A265630 A265631 * A265633 A265634 A265635

Keyword

nonn

Author

R. H. Hardin, Dec 11 2015

Status

approved