A265595 Number of nX2 0..n*2-1 arrays with upper left zero and lower right n*2-1 and each element differing from its horizontal, vertical and antidiagonal neighbors by a power of two.

1, 2, 4, 8, 166, 257, 1627, 19283, 90682, 542663, 6657907, 21585283, 151468895, 1794394408, 6074973762, 38138795310, 768443343629, 2396280011230, 16859340797106, 253945311071870, 892229591233283, 6144902621608354

Offset

1,2

Comments

Column 2 of A265601.

Links

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

Example

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

Crossrefs

Cf. A265601.

Sequence in context: A110746 A084010 A203630 * A133036 A083147 A012648

Adjacent sequences: A265592 A265593 A265594 * A265596 A265597 A265598

Keyword

nonn

Author

R. H. Hardin, Dec 10 2015

Status

approved