A298390 Number of n X n 0..1 arrays with every element equal to 1, 2, 4, 5 or 6 king-move adjacent elements, with upper left element zero.

0, 3, 15, 112, 2231, 117184, 16510708, 4149393799, 2858791588717

Offset

1,2

Comments

Diagonal of A298396.

Links

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

Example

Some solutions for n=5
..0..1..0..1..1. .0..1..1..0..1. .0..1..0..1..1. .0..1..0..0..1
..1..0..0..1..0. .1..0..0..1..1. .0..1..1..0..0. .0..0..1..1..1
..1..0..0..0..0. .0..0..1..0..0. .0..1..1..1..1. .1..1..0..1..1
..0..1..0..1..1. .1..1..0..0..1. .1..1..1..0..0. .0..1..1..1..0
..0..1..0..0..1. .1..0..1..0..1. .0..0..0..1..1. .1..0..0..0..1

Crossrefs

Cf. A298396.

Sequence in context: A135083 A323772 A058104 * A299508 A299308 A300109

Adjacent sequences: A298387 A298388 A298389 * A298391 A298392 A298393

Keyword

nonn

Author

R. H. Hardin, Jan 18 2018

Status

approved