A189700 Number of 7Xn binary arrays without the pattern 0 0 1 diagonally, vertically or antidiagonally.

54, 2916, 77752, 1999150, 55423132, 1553640701, 43645304766, 1226051976034, 34463827972461, 968925997882076, 27242280161913994, 765954539776147015, 21536381951216338725, 605544975017743747314, 17026369106775648529847

Offset

1,1

Comments

Row 7 of A189696

Links

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

Example

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

Crossrefs

Sequence in context: A206784 A188521 A189262 * A206893 A188761 A207093

Adjacent sequences: A189697 A189698 A189699 * A189701 A189702 A189703

Keyword

nonn

Author

R. H. Hardin, Apr 25 2011

Status

approved