A265494 T(n,k) = Number of n X k 0..n*k-1 arrays with upper left zero and lower right n*k-1 and each element differing from its horizontal, vertical and diagonal neighbors by a power of two.

1, 1, 1, 1, 0, 1, 2, 0, 0, 2, 16, 12, 36, 12, 16, 79, 0, 0, 0, 0, 79, 456, 0, 0, 0, 0, 0, 456, 2194, 1030, 2506, 0, 0, 2506, 1030, 2194, 20801, 0, 294152, 3249, 0, 3249, 294152, 0, 20801, 142675, 0, 0, 595253, 0, 0, 595253, 0, 0, 142675, 1104671, 298764, 19516777

Offset

1,7

Comments

Table starts

......1......1........1...........2............16............79.............456

......1......0........0..........12.............0.............0............1030

......1......0.......36...........0.............0..........2506..........294152

......2.....12........0...........0.............0..........3249..........595253

.....16......0........0...........0.............0.............0.......949287922

.....79......0.....2506........3249.............0.......7928582.......223328748

....456...1030...294152......595253.....949287922.....223328748.316185648156135

...2194......0........0....11022848.............0.............0....121504746202

..20801......0.19516777...504744595.............0.1549060833483

.142675.298764.83909226.21040741278.1252731688676

Links

R. H. Hardin, Table of n, a(n) for n = 1..112

Crossrefs

Column 1 is A265173.

Sequence in context: A330607 A169776 A240766 * A091731 A284269 A140579

Adjacent sequences: A265491 A265492 A265493 * A265495 A265496 A265497

Keyword

nonn,tabl

Author

R. H. Hardin, Dec 09 2015

Status

approved