A317427 Number of nX6 0..1 arrays with every element unequal to 0, 1, 3, 5, 6, 7 or 8 king-move adjacent elements, with upper left element zero.

13, 105, 148, 640, 2891, 9116, 32359, 125832, 439409, 1569243, 5838001, 20921309, 75145761, 275012020, 993320053, 3581537950, 13021568490, 47138154809, 170339377429, 617708630989, 2237181582408, 8093518693967, 29321389145176

Offset

1,1

Comments

Column 6 of A317429.

Links

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

Example

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

Crossrefs

Cf. A317429.

Sequence in context: A305345 A316613 A316425 * A320204 A080422 A030055

Adjacent sequences: A317424 A317425 A317426 * A317428 A317429 A317430

Keyword

nonn

Author

R. H. Hardin, Jul 27 2018

Status

approved