A265636 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, diagonal and antidiagonal neighbors by a power of two.

1, 0, 64, 559, 10444, 154825, 2325672, 32134921, 1147830996, 27155305770, 705652093502, 13954523202055, 385113044700852, 8391065973567203, 193546379545559324, 4212282964238008204, 146184585283154036226

Offset

1,3

Comments

Row 2 of A265635.

Links

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

Example

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

Crossrefs

Cf. A265635.

Sequence in context: A200841 A247929 A070054 * A209787 A247841 A209780

Adjacent sequences: A265633 A265634 A265635 * A265637 A265638 A265639

Keyword

nonn

Author

R. H. Hardin, Dec 11 2015

Status

approved