A306135 Number of nX7 0..1 arrays with every element unequal to 0, 2, 3, 4, 6 or 7 king-move adjacent elements, with upper left element zero.

1, 908, 3302, 111073, 2889140, 50158767, 1284005626, 29447872807, 652802237683, 15308624071915, 350841208595308, 8037819883921617, 185462115926508188, 4261924531059528797, 98007748366954084707, 2255491854442484629724

Offset

1,2

Comments

Column 7 of A306136.

Links

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

Example

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

Crossrefs

Cf. A306136.

Sequence in context: A316575 A304550 A316375 * A317270 A002617 A304418

Adjacent sequences: A306132 A306133 A306134 * A306136 A306137 A306138

Keyword

nonn

Author

R. H. Hardin, Jun 22 2018

Status

approved