A304417 Number of nX6 0..1 arrays with every element unequal to 0, 2, 3, 4 or 5 king-move adjacent elements, with upper left element zero.

1, 272, 2671, 60245, 1389257, 32181958, 755715475, 17729422188, 416850100691, 9802695636421, 230580600605761, 5424215008615737, 127605765822837170, 3002004817470375696, 70624643094278572766, 1661510342437803768396

Offset

1,2

Comments

Column 6 of A304419.

Links

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

Example

Some solutions for n=5
..0..1..1..0..0..1. .0..1..1..0..1..0. .0..1..1..0..0..1. .0..1..1..0..1..1
..0..1..0..1..0..0. .0..1..0..1..0..1. .0..1..1..0..1..0. .0..1..0..1..0..0
..0..0..1..0..1..1. .0..1..0..0..1..1. .0..0..1..1..0..1. .0..1..0..0..1..1
..1..1..1..1..0..1. .0..1..1..0..0..0. .1..1..0..0..0..0. .0..1..1..0..0..1
..0..1..0..0..0..1. .1..0..1..1..1..1. .1..1..0..1..1..1. .1..0..1..0..1..0

Crossrefs

Cf. A304419.

Sequence in context: A253113 A234884 A158587 * A316242 A230908 A305952

Adjacent sequences: A304414 A304415 A304416 * A304418 A304419 A304420

Keyword

nonn

Author

R. H. Hardin, May 12 2018

Status

approved