A207492 Number of 7Xn 0..1 arrays avoiding 0 0 0 and 0 1 1 horizontally and 0 1 1 and 1 1 0 vertically

35, 1225, 2233, 11306, 39050, 89417, 268275, 667760, 1691526, 4324858, 10910668, 28038606, 71784122, 186198243, 482642047, 1259170885, 3300248079, 8616047712, 22660486326, 59449698479, 156019165327, 410863919802, 1077513243234

Offset

1,1

Comments

Row 7 of A207488

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Example

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

Crossrefs

Sequence in context: A218737 A126158 A200724 * A207889 A208112 A208844

Adjacent sequences: A207489 A207490 A207491 * A207493 A207494 A207495

Keyword

nonn

Author

R. H. Hardin Feb 18 2012

Status

approved