A297873 Number of nX5 0..1 arrays with every element equal to 2, 3 or 5 king-move adjacent elements, with upper left element zero.

0, 11, 0, 20, 80, 231, 579, 2437, 7507, 26278, 91622, 316406, 1091518, 3805139, 13166620, 45743807, 158968332, 552175778, 1918002602, 6665774473, 23158033370, 80468332463, 279615402191, 971597706573, 3376114511226, 11731585710994

Offset

1,2

Comments

Column 5 of A297876.

Links

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

Example

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

Crossrefs

Cf. A297876.

Sequence in context: A087557 A186072 A299780 * A298136 A334370 A274851

Adjacent sequences: A297870 A297871 A297872 * A297874 A297875 A297876

Keyword

nonn

Author

R. H. Hardin, Jan 07 2018

Status

approved