A208032 Number of 7 X n 0..1 arrays avoiding 0 0 0 and 0 0 1 horizontally and 0 0 0 and 1 0 1 vertically.

28, 784, 5404, 61292, 574560, 5788524, 56728924, 561913408, 5542832148, 54764938004, 540744613920, 5340655599188, 52741354585556, 520866777405464, 5143921470354156, 50800175218659076, 501689190833405736

Offset

1,1

Comments

Row 7 of A208028.

Links

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

Formula

Empirical: a(n) = 5*a(n-1) +62*a(n-2) -73*a(n-3) -736*a(n-4) +779*a(n-5) +3097*a(n-6) -3814*a(n-7) -4207*a(n-8) +5531*a(n-9) +2469*a(n-10) -2932*a(n-11) -644*a(n-12) +428*a(n-13).

Example

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

Crossrefs

Cf. A208028.

Sequence in context: A267785 A223496 A208043 * A264368 A224266 A223923

Adjacent sequences: A208029 A208030 A208031 * A208033 A208034 A208035

Keyword

nonn

Author

R. H. Hardin Feb 22 2012

Status

approved