A207773 Number of nX7 0..1 arrays avoiding 0 0 0 and 1 1 1 horizontally and 0 0 1 and 0 1 0 vertically

42, 1764, 8928, 43260, 240346, 1246206, 6513576, 35632160, 198768426, 1120451746, 6383202712, 36626389034, 211006949114, 1219147066568, 7059475772964, 40937679494772, 237631015514224, 1380398824589554, 8023019135887764

Offset

1,1

Comments

Column 7 of A207774

Links

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

Example

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

Crossrefs

Sequence in context: A208839 A208687 A207351 * A207900 A207660 A207452

Adjacent sequences: A207770 A207771 A207772 * A207774 A207775 A207776

Keyword

nonn

Author

R. H. Hardin Feb 20 2012

Status

approved