A298889 Number of n X n 0..1 arrays with every element equal to 2, 3, 5, 6 or 8 king-move adjacent elements, with upper left element zero.

0, 1, 1, 11, 219, 2963, 74725, 5719782, 724538480, 145951109194

Offset

1,4

Comments

Diagonal of A298895.

Links

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

Example

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

Crossrefs

Cf. A298895.

Sequence in context: A357083 A214687 A160074 * A204236 A035012 A179339

Adjacent sequences: A298886 A298887 A298888 * A298890 A298891 A298892

Keyword

nonn

Author

R. H. Hardin, Jan 28 2018

Status

approved