A297874 Number of nX6 0..1 arrays with every element equal to 2, 3 or 5 king-move adjacent elements, with upper left element zero.

0, 13, 3, 68, 231, 887, 3307, 13910, 55501, 228947, 947582, 3930953, 16243210, 67305782, 278635282, 1154097789, 4780226279, 19802856358, 82032779562, 339845971291, 1407890373170, 5832655811595, 24163797280825, 100107714077232

Offset

1,2

Comments

Column 6 of A297876.

Links

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

Example

Some solutions for n=7
..0..0..0..0..1..1. .0..0..1..1..1..1. .0..0..1..0..0..1. .0..0..1..0..1..1
..0..1..1..0..0..1. .0..1..0..0..0..1. .0..1..1..0..1..1. .0..1..0..1..0..1
..0..1..0..1..0..1. .1..0..1..1..0..1. .1..0..0..0..0..1. .0..1..1..0..0..1
..0..1..0..1..1..1. .1..0..1..0..1..1. .0..1..1..1..1..0. .0..1..0..1..0..1
..0..1..1..0..0..1. .1..0..1..0..0..0. .0..0..0..0..0..1. .0..1..0..1..0..1
..0..1..0..1..1..0. .1..0..1..0..1..0. .1..1..1..0..1..1. .1..0..1..0..0..1
..0..0..1..0..0..0. .1..1..0..1..1..1. .1..1..1..0..0..1. .1..1..0..0..1..1

Crossrefs

Cf. A297876.

Sequence in context: A170922 A005602 A272175 * A298137 A155847 A329983

Adjacent sequences: A297871 A297872 A297873 * A297875 A297876 A297877

Keyword

nonn

Author

R. H. Hardin, Jan 07 2018

Status

approved