A299243 Number of n X n 0..1 arrays with every element equal to 0, 2, 3, 5, 6 or 7 king-move adjacent elements, with upper left element zero.

1, 5, 6, 55, 1095, 35320, 2044405, 321811361, 111378069579, 67948097097737

Offset

1,2

Comments

Diagonal of A299249.

Links

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

Example

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

Crossrefs

Cf. A299249.

Sequence in context: A269908 A157805 A256291 * A191557 A223530 A132444

Adjacent sequences: A299240 A299241 A299242 * A299244 A299245 A299246

Keyword

nonn

Author

R. H. Hardin, Feb 05 2018

Status

approved