A207839 Number of n X n 0..1 arrays avoiding 0 0 0 and 0 0 1 horizontally and 0 0 0 and 1 1 1 vertically

2, 16, 72, 780, 10144, 181896, 5346600, 235865752, 13718515360, 1274547293612, 182632256870400, 35910248805192512, 10519355362828229320, 4986223632232028372840, 3295839087283933350008520

Offset

1,1

Comments

Diagonal of A207845

Links

R. H. Hardin, Table of n, a(n) for n = 1..22

Example

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

Crossrefs

Sequence in context: A207508 A208063 A207923 * A216424 A212897 A289837

Adjacent sequences: A207836 A207837 A207838 * A207840 A207841 A207842

Keyword

nonn

Author

R. H. Hardin Feb 21 2012

Status

approved