A296123 Number of n X n 0..1 arrays with each 1 adjacent to 2 or 5 king-move neighboring 1's.

1, 5, 18, 74, 2098, 54286, 1810441, 227074899, 41069612676, 11999602459480, 8460640112181759, 10489963059013433653

Offset

1,2

Comments

Diagonal of A296128.

Links

Table of n, a(n) for n=1..12.

Example

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

Crossrefs

Cf. A296128.

Sequence in context: A183443 A034551 A052926 * A242054 A027134 A227451

Adjacent sequences: A296120 A296121 A296122 * A296124 A296125 A296126

Keyword

nonn

Author

R. H. Hardin, Dec 05 2017

Status

approved