A202788 Number of n X n binary arrays with every one adjacent to another one horizontally, diagonally, antidiagonally or vertically

1, 12, 398, 45519, 21649928, 41382940317, 314293683119573, 9507225584601580673, 1146261969825089219425266, 550762886957237938187269588944, 1054576957682838130471744629459577753

Offset

1,2

Comments

Diagonal of A202795

Links

R. H. Hardin, Table of n, a(n) for n = 1..15

Example

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

Crossrefs

Sequence in context: A356258 A286038 A276482 * A285028 A292784 A003772

Adjacent sequences: A202785 A202786 A202787 * A202789 A202790 A202791

Keyword

nonn

Author

R. H. Hardin Dec 24 2011

Status

approved