A207004 Number of 7Xn 0..1 arrays avoiding 0 1 0 horizontally and 0 1 1 vertically

54, 2916, 61003, 1124120, 22816988, 490003769, 10432265840, 218637649146, 4572897018607, 95971301545030, 2016876598616899, 42362715890770207, 889374671577272079, 18672246190599282488, 392068641835583132666

Offset

1,1

Comments

Row 7 of A207000

Links

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

Example

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

Crossrefs

Sequence in context: A188605 A188849 A188856 * A206784 A188521 A189262

Adjacent sequences: A207001 A207002 A207003 * A207005 A207006 A207007

Keyword

nonn

Author

R. H. Hardin Feb 14 2012

Status

approved