A265615 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 and diagonal neighbors by a power of two.

1, 0, 45, 1098, 86800, 3882992, 199692576, 10078711072, 1696870266800, 145139567193300, 13546296060670325, 1187049535139072700, 119750974794907122850, 11360997964869380793175, 1099198326991641651851775

Offset

1,3

Comments

Column 2 of A265619.

Links

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

Example

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

Crossrefs

Cf. A265619.

Sequence in context: A317895 A282929 A177728 * A320363 A140346 A268870

Adjacent sequences: A265612 A265613 A265614 * A265616 A265617 A265618

Keyword

nonn

Author

R. H. Hardin, Dec 10 2015

Status

approved