A296967 Number of n X n 0..1 arrays with each 1 adjacent to 2, 4 or 5 king-move neighboring 1's.

1, 5, 31, 274, 13543, 1154298, 222799447, 143300513381, 227497889396792

Offset

1,2

Comments

Diagonal of A296974.

Links

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

Example

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

Crossrefs

Cf. A296974.

Sequence in context: A259787 A273601 A218679 * A347416 A292462 A340392

Adjacent sequences: A296964 A296965 A296966 * A296968 A296969 A296970

Keyword

nonn

Author

R. H. Hardin, Dec 22 2017

Status

approved