A207471 Number of 7 X n 0..1 arrays avoiding 0 0 0 and 0 1 1 horizontally and 0 1 0 and 1 0 1 vertically.

42, 1764, 12994, 101233, 644401, 3205650, 16675001, 76629370, 345252578, 1534975920, 6569471819, 28198798691, 119211939368, 501052508853, 2103730122314, 8781162264514, 36654035342450, 152721010610871

Offset

1,1

Comments

Row 7 of A207467.

Links

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

Example

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

Crossrefs

Cf. A207467.

Sequence in context: A208554 A207922 A208702 * A207523 A207258 A207953

Adjacent sequences: A207468 A207469 A207470 * A207472 A207473 A207474

Keyword

nonn

Author

R. H. Hardin, Feb 18 2012

Status

approved