A207181 Number of nX7 0..1 arrays avoiding 0 0 0 horizontally and 0 1 0 vertically

81, 6561, 248525, 9196215, 368714705, 14960137403, 600838995529, 24069606968809, 965286091829121, 38732271412245771, 1553999307045885583, 62342694966576014475, 2501032004180975268881, 100336844251838872157471

Offset

1,1

Comments

Column 7 of A207182

Links

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

Example

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

Crossrefs

Sequence in context: A223977 A188565 A207087 * A188752 A223572 A188872

Adjacent sequences: A207178 A207179 A207180 * A207182 A207183 A207184

Keyword

nonn

Author

R. H. Hardin Feb 15 2012

Status

approved