A207665 Number of 7Xn 0..1 arrays avoiding 0 0 0 and 1 1 1 horizontally and 0 0 1 and 1 0 0 vertically

35, 1225, 2748, 30440, 284108, 1296732, 12327618, 111194040, 568720390, 5097396968, 44256504494, 245572154342, 2110910392152, 17764389355898, 104925838177000, 874050853859324, 7172887272193780, 44488820281290176

Offset

1,1

Comments

Row 7 of A207661

Links

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

Example

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

Crossrefs

Sequence in context: A207889 A208112 A208844 * A208006 A207568 A209649

Adjacent sequences: A207662 A207663 A207664 * A207666 A207667 A207668

Keyword

nonn

Author

R. H. Hardin Feb 19 2012

Status

approved