A207807 Number of nX7 0..1 arrays avoiding 0 0 0 and 0 0 1 horizontally and 0 1 0 and 1 0 1 vertically

42, 1764, 14946, 209050, 2485392, 31431114, 388134978, 4829044276, 59932307050, 744575694026, 9247079324448, 114855785954414, 1426522758927058, 17717786782797060, 220058305703080950, 2733176728894351270

Offset

1,1

Comments

Column 7 of A207808

Links

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

Example

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

Crossrefs

Sequence in context: A208286 A208419 A208027 * A208368 A207716 A208077

Adjacent sequences: A207804 A207805 A207806 * A207808 A207809 A207810

Keyword

nonn

Author

R. H. Hardin Feb 20 2012

Status

approved