A265493 Number of nX7 0..n*7-1 arrays with upper left zero and lower right n*7-1 and each element differing from its horizontal, vertical and diagonal neighbors by a power of two.

456, 1030, 294152, 595253, 949287922, 223328748, 316185648156135, 121504746202, 15215491198062021, 145636281907673112

Offset

1,1

Comments

Column 7 of A265494.

Links

Table of n, a(n) for n=1..10.

Example

Some solutions for n=2
..0..4..5..9.10.11..9....0..4..5..9.13.11..9....0..4..5..3..7..5..9
..4..2..3..7.11.12.13....4..8..6..7.11..9.13....1..2..3..7.11..9.13

Crossrefs

Cf. A265494.

Sequence in context: A203058 A116331 A099650 * A265600 A222552 A200784

Adjacent sequences: A265490 A265491 A265492 * A265494 A265495 A265496

Keyword

nonn

Author

R. H. Hardin, Dec 09 2015

Status

approved