A316121 Number of nX6 0..1 arrays with every element unequal to 0, 2, 3, 5, 6 or 7 king-move adjacent elements, with upper left element zero.

1, 49, 144, 702, 5426, 43480, 283238, 2064800, 15977233, 116608607, 858256097, 6440073113, 47877563340, 355152715761, 2646475707180, 19706024586437, 146557771466279, 1090878142968706, 8120995743454821, 60436020674609822

Offset

1,2

Comments

Column 6 of A316123.

Links

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

Example

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

Crossrefs

Cf. A316123.

Sequence in context: A211501 A345115 A009404 * A087354 A098442 A088535

Adjacent sequences: A316118 A316119 A316120 * A316122 A316123 A316124

Keyword

nonn

Author

R. H. Hardin, Jun 24 2018

Status

approved