A304346 Number of nX7 0..1 arrays with every element unequal to 0, 1, 2, 4 or 5 king-move adjacent elements, with upper left element zero.

64, 752, 1752, 18855, 127511, 741942, 4921043, 36193582, 250785575, 1779945291, 12929993002, 94656684886, 695667963845, 5171776044984, 38719889240747, 291633802759322, 2210618685640386, 16857082428252540, 129166332857398739

Offset

1,1

Comments

Column 7 of A304347.

Links

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

Example

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

Crossrefs

Cf. A304347.

Sequence in context: A195593 A221753 A055867 * A316217 A305641 A317035

Adjacent sequences: A304343 A304344 A304345 * A304347 A304348 A304349

Keyword

nonn

Author

R. H. Hardin, May 11 2018

Status

approved