A208308 Number of n X n 0..1 arrays with new values 0..1 introduced in row major order and no element equal to more than one of its immediate leftward or upward neighbors

1, 6, 78, 2052, 106488, 10771434, 2110085532, 797446347192, 579943875020256, 810217005148827936, 2171732709752890892010, 11158300810941107526534798, 109816641995164952307022930896, 2069071339726973812974860505491442

Offset

1,2

Comments

Diagonal of A208314

Links

R. H. Hardin, Table of n, a(n) for n = 1..17

Example

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

Crossrefs

Sequence in context: A177556 A219435 A219135 * A353411 A053771 A294992

Adjacent sequences: A208305 A208306 A208307 * A208309 A208310 A208311

Keyword

nonn

Author

R. H. Hardin Feb 25 2012

Status

approved