A304543 Number of nX7 0..1 arrays with every element unequal to 0, 1, 3, 4 or 6 king-move adjacent elements, with upper left element zero.

21, 127, 129, 808, 2792, 9840, 53098, 285622, 1415123, 8070788, 46626298, 264656323, 1540155897, 9031209225, 52836601996, 310654081048, 1830571135620, 10790622849760, 63681959164268, 376067319191032, 2221525051427895

Offset

1,1

Comments

Column 7 of A304544.

Links

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

Example

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

Crossrefs

Cf. A304544.

Sequence in context: A304854 A305251 A316551 * A306128 A316310 A317265

Adjacent sequences: A304540 A304541 A304542 * A304544 A304545 A304546

Keyword

nonn

Author

R. H. Hardin, May 14 2018

Status

approved