A297676 Number of n X n 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 0, 1 or 4 neighboring 1's.

2, 11, 150, 4633, 401678, 78957968, 41030621948, 49892385650107, 157266548152111938, 1187668466030040777022, 22731639382952184172610914, 1058867886808501107531538859306

Offset

1,1

Comments

Diagonal of A297682.

Links

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

Example

Some solutions for n=4
..1..0..0..0. .0..0..0..0. .1..0..0..0. .0..1..0..1. .0..0..0..1
..1..0..0..1. .0..0..0..0. .0..0..0..0. .0..1..0..1. .0..1..0..0
..1..0..0..0. .0..0..0..1. .1..0..0..1. .0..0..0..0. .0..0..1..1
..0..0..1..0. .0..0..0..0. .1..0..0..0. .0..0..1..0. .0..1..0..1

Crossrefs

Cf. A297682.

Sequence in context: A006122 A111014 A171184 * A049462 A227328 A287149

Adjacent sequences: A297673 A297674 A297675 * A297677 A297678 A297679

Keyword

nonn

Author

R. H. Hardin, Jan 03 2018

Status

approved