A298331 Number of n X n 0..1 arrays with every element equal to 1, 2, 3, 4 or 6 king-move adjacent elements, with upper left element zero.

0, 4, 113, 5663, 755110, 268494008, 242019919082, 559205410771472, 3316464212029290964

Offset

1,2

Comments

Diagonal of A298337.

Links

Table of n, a(n) for n=1..9.

Example

Some solutions for n=4
..0..0..0..0. .0..0..0..1. .0..0..0..1. .0..0..1..1. .0..1..0..1
..0..1..1..0. .1..1..0..1. .0..1..0..1. .0..1..1..1. .1..0..1..1
..0..1..0..1. .1..1..0..0. .0..1..0..0. .0..1..0..1. .1..0..1..0
..1..0..0..0. .0..0..1..0. .1..1..0..0. .0..0..1..1. .0..1..0..0

Crossrefs

Cf. A298337.

Sequence in context: A078780 A041377 A103499 * A299394 A299222 A300036

Adjacent sequences: A298328 A298329 A298330 * A298332 A298333 A298334

Keyword

nonn

Author

R. H. Hardin, Jan 17 2018

Status

approved