A265176 Number of nX4 0..n*4-1 arrays with upper left zero and lower right n*4-1 and each element differing from its horizontal and vertical neighbors by a power of two.

2, 139, 170970, 36765048, 19256175024, 7187180809683, 2362949716450873, 843066901320090228, 786229883043780152659, 493493320537858294879619, 294732734608666165262289214, 146109268578429647861705542348

Offset

1,1

Comments

Column 4 of A265178.

Links

R. H. Hardin, Table of n, a(n) for n = 1..45

Example

Some solutions for n=3
..0..8..9..5....0..2..4..5....0..4..3..2....0..1..9.11....0..8..9..5
..1..0..8..9....1..3..5..3....1..3.11.10....4..3..1..3....2..6..5..7
..9..1..9.11....3..2..3.11....3..2..3.11....3..1..9.11....6.10..9.11

Crossrefs

Cf. A265178.

Sequence in context: A152509 A265462 A094482 * A101232 A093887 A152005

Adjacent sequences: A265173 A265174 A265175 * A265177 A265178 A265179

Keyword

nonn

Author

R. H. Hardin, Dec 03 2015

Status

approved