A207698 Number of 7Xn 0..1 arrays avoiding 0 0 0 and 0 1 0 horizontally and 0 0 1 and 1 1 1 vertically

25, 625, 1250, 2500, 10000, 40000, 145200, 527076, 2056032, 8020224, 29854944, 111133764, 429565416, 1660399504, 6232977072, 23397985296, 90031551120, 346426416400, 1306080208880, 4924120769296, 18891767424072, 72479716304004

Offset

1,1

Comments

Row 7 of A207693

Links

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

Example

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

Crossrefs

Sequence in context: A209222 A207691 A207926 * A207594 A207513 A207687

Adjacent sequences: A207695 A207696 A207697 * A207699 A207700 A207701

Keyword

nonn

Author

R. H. Hardin Feb 19 2012

Status

approved