A207933 Number of 7Xn 0..1 arrays avoiding 0 0 0 and 0 1 0 horizontally and 0 0 0 and 1 1 1 vertically

42, 1764, 6216, 21904, 126688, 732736, 3773248, 19430464, 105642128, 574369156, 3050871800, 16205290000, 87703589600, 474654858304, 2537509425088, 13565549724736, 73283287813072, 395888141775844, 2122391971076888

Offset

1,1

Comments

Row 7 of A207928

Links

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

Example

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

Crossrefs

Sequence in context: A206986 A208378 A208068 * A207850 A208839 A208687

Adjacent sequences: A207930 A207931 A207932 * A207934 A207935 A207936

Keyword

nonn

Author

R. H. Hardin Feb 21 2012

Status

approved