A265620 Number of 2Xn 0..2*n-1 arrays with upper left zero and lower right 2*n-1 and each element differing from its horizontal and diagonal neighbors by a power of two.

1, 0, 64, 908, 29296, 538517, 10912865, 202080075, 11808714880, 409351818615, 15022337089473, 422671294158187, 16797595808657585, 525856235658025845, 17318652008137477581, 541691832239493218144, 30028029442866868463331

Offset

1,3

Comments

Row 2 of A265619.

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Example

Some solutions for n=4
..0..1..3..5....0..2..6..2....0..4..3..1....0..1..5..1....0..4..5..4
..3..1..5..7....3..4..3..7....0..2..6..7....5..1..3..7....0..1..3..7

Crossrefs

Cf. A265619.

Sequence in context: A306613 A185368 A027003 * A358861 A253133 A302321

Adjacent sequences: A265617 A265618 A265619 * A265621 A265622 A265623

Keyword

nonn

Author

R. H. Hardin, Dec 10 2015

Status

approved