A296389 Number of n X n 0..1 arrays with each 1 horizontally, vertically or antidiagonally adjacent to 1 or 3 neighboring 1's.

1, 6, 36, 597, 21769, 1740403, 313843472, 124433749976, 109752217137032, 214577693619739949, 930506314275700114026, 8950548080850337784771728

Offset

1,2

Comments

Diagonal of A296396.

Links

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

Example

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

Crossrefs

Cf. A296396.

Sequence in context: A366654 A367488 A339300 * A077290 A222780 A206636

Adjacent sequences: A296386 A296387 A296388 * A296390 A296391 A296392

Keyword

nonn

Author

R. H. Hardin, Dec 11 2017

Status

approved