A299355 Number of n X n 0..1 arrays with every element equal to 0, 1, 2, 3, 6 or 8 king-move adjacent elements, with upper left element zero.

1, 8, 70, 649, 8269, 121386, 2195326, 55671460, 2065637548, 105768593369, 7817766240120, 873950649404684, 140851588459236089

Offset

1,2

Comments

Diagonal of A299359.

Links

Table of n, a(n) for n=1..13.

Example

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

Crossrefs

Cf. A299359.

Sequence in context: A190560 A266361 A298281 * A299175 A299938 A152263

Adjacent sequences: A299352 A299353 A299354 * A299356 A299357 A299358

Keyword

nonn

Author

R. H. Hardin, Feb 08 2018

Status

approved