A296328 Number of n X n 0..1 arrays with each 1 horizontally, vertically or antidiagonally adjacent to 0 or 2 neighboring 1's.

2, 8, 64, 1235, 50595, 4476519, 869077778, 366077961514, 335596576750584, 669918796268237474, 2910017609941646409850, 27515650943860323389048352, 566341048893984999950037393720, 25373839553082331349391351332105201

Offset

1,1

Comments

Diagonal of A296335.

Links

Table of n, a(n) for n=1..14.

Example

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

Crossrefs

Cf. A296335.

Sequence in context: A006125 A193753 A006119 * A322066 A255133 A073113

Adjacent sequences: A296325 A296326 A296327 * A296329 A296330 A296331

Keyword

nonn

Author

R. H. Hardin, Dec 10 2017

Status

approved