A296571 Number of n X n 0..1 arrays with each 1 horizontally, vertically or antidiagonally adjacent to 0, 1 or 3 neighboring 1's.

2, 11, 135, 4543, 368720, 76657600, 40337678992, 53581963873035, 180182113404833816, 1531920692297677424230, 32940396032569628105781490, 1791350856665706531145980060981

Offset

1,1

Comments

Diagonal of A296578.

Links

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

Example

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

Crossrefs

Cf. A296578.

Sequence in context: A139387 A041725 A330638 * A077544 A087480 A060059

Adjacent sequences: A296568 A296569 A296570 * A296572 A296573 A296574

Keyword

nonn

Author

R. H. Hardin, Dec 15 2017

Status

approved