A232069 Number of (n+1)X(n+1) 0..1 arrays with every element equal to some horizontal, diagonal or antidiagonal neighbor, with top left element zero

3, 87, 6624, 2265691, 3154769585, 16761785898550, 346245388962998639, 27933597031900237580649, 8787110268003730673863070121, 10774541106851322777417902818902431

Offset

1,1

Comments

Diagonal of A232076

Links

Table of n, a(n) for n=1..10.

Example

Some solutions for n=3
..0..0..0..0....0..1..1..1....0..0..0..1....0..0..1..1....0..0..0..0
..1..1..0..1....1..0..1..1....0..1..1..0....1..1..0..1....0..0..0..0
..0..0..1..0....0..0..0..0....1..0..1..1....1..1..0..0....1..0..0..0
..0..0..1..1....1..1..1..1....0..1..1..1....0..0..1..0....1..1..1..0

Crossrefs

Sequence in context: A279131 A368620 A230670 * A172723 A331645 A037112

Adjacent sequences: A232066 A232067 A232068 * A232070 A232071 A232072

Keyword

nonn

Author

R. H. Hardin, Nov 17 2013

Status

approved