A207117 Number of n X n 0..1 arrays avoiding 0 0 1 and 0 1 0 horizontally and 0 0 1 and 0 1 1 vertically.

2, 16, 102, 1024, 12288, 175561, 2330037, 40119556, 667127008, 12622297801, 236060280854, 5051251755001, 104507364758952, 2416776784204176, 54925343492859621, 1369884877162739344, 33478733130375924736

Offset

1,1

Comments

Diagonal of A207123

Links

R. H. Hardin, Table of n, a(n) for n = 1..19

Example

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

Crossrefs

Sequence in context: A207236 A207955 A207494 * A208415 A207945 A207853

Adjacent sequences: A207114 A207115 A207116 * A207118 A207119 A207120

Keyword

nonn

Author

R. H. Hardin, Feb 15 2012

Status

approved