A297869 Number of n X n 0..1 arrays with every element equal to 2, 3 or 5 king-move adjacent elements, with upper left element zero.

0, 1, 0, 10, 80, 887, 13778, 428609, 15589226, 918365908

Offset

1,4

Comments

Diagonal of A297876.

Links

Table of n, a(n) for n=1..10.

Example

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

Crossrefs

Cf. A297876.

Sequence in context: A200162 A165511 A165750 * A138425 A010569 A136870

Adjacent sequences: A297866 A297867 A297868 * A297870 A297871 A297872

Keyword

nonn

Author

R. H. Hardin, Jan 07 2018

Status

approved