A265591 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 antidiagonal neighbors by a power of two.

1, 2, 84, 1354, 38791, 905458, 22977880, 517900514, 22987752597, 786599232404, 29092136543507, 913648420769831, 35187548561281832, 1167539263086885624, 39956736928795429167, 1306138963191078431958, 64687399192829411688656

Offset

1,2

Comments

Row 2 of A265590.

Links

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

Example

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

Crossrefs

Cf. A265590.

Sequence in context: A367900 A205643 A215263 * A348265 A157063 A372716

Adjacent sequences: A265588 A265589 A265590 * A265592 A265593 A265594

Keyword

nonn

Author

R. H. Hardin, Dec 10 2015

Status

approved