A305953 Number of nX7 0..1 arrays with every element unequal to 0, 2, 3, 4, 5 or 7 king-move adjacent elements, with upper left element zero.

1, 908, 14652, 705763, 30700722, 1406191296, 64233268442, 2949134027463, 135468194522667, 6227151177165463, 286296487893592313, 13164179576247841689, 605327650429289802592, 27835345940539704996531

Offset

1,2

Comments

Column 7 of A305954.

Links

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

Example

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

Crossrefs

Cf. A305954.

Sequence in context: A002617 A304418 A316243 * A317214 A305684 A317064

Adjacent sequences: A305950 A305951 A305952 * A305954 A305955 A305956

Keyword

nonn

Author

R. H. Hardin, Jun 15 2018

Status

approved