A188752 Number of 7Xn binary arrays without the pattern 1 1 1 diagonally, vertically or antidiagonally

81, 6561, 289776, 15398676, 828466161, 43558358008, 2307086087740, 122293738629021, 6476421031528420, 343061756270359870, 18173221774555803823, 962672885162309091074, 50995334218704721900811

Offset

1,1

Comments

Row 7 of A188747

Links

R. H. Hardin, Table of n, a(n) for n = 1..200

Example

Some solutions for 7X3
..0..1..0....0..0..0....0..0..0....0..0..0....0..0..0....0..0..1....0..0..0
..0..0..0....1..1..1....1..1..1....0..0..0....0..1..1....0..1..0....1..1..1
..1..1..0....1..0..1....0..1..1....1..1..0....0..0..0....0..1..1....0..0..0
..0..0..0....0..0..0....0..0..0....0..0..0....0..1..0....0..0..0....0..1..1
..0..0..0....0..0..0....0..0..0....0..1..1....1..1..0....0..1..0....1..1..0
..0..0..1....0..0..0....0..1..0....1..0..0....0..0..1....0..0..1....0..0..0
..1..0..1....1..0..0....1..1..1....0..0..0....1..1..1....0..0..0....0..1..1

Crossrefs

Sequence in context: A188565 A207087 A207181 * A223572 A188872 A217997

Adjacent sequences: A188749 A188750 A188751 * A188753 A188754 A188755

Keyword

nonn

Author

R. H. Hardin Apr 09 2011

Status

approved