A207241 Number of nX7 0..1 arrays avoiding 0 0 0 and 0 1 1 horizontally and 0 0 1 and 0 1 0 vertically

25, 625, 3355, 17929, 122197, 683257, 3510185, 18982182, 99915970, 505774921, 2568234125, 12986009155, 64726463915, 321230475656, 1590644502408, 7833019325065, 38434345117724, 188211984325803, 919273907789464

Offset

1,1

Comments

Column 7 of A207242

Links

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

Example

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

Crossrefs

Sequence in context: A208116 A207367 A207499 * A207110 A207466 A207701

Adjacent sequences: A207238 A207239 A207240 * A207242 A207243 A207244

Keyword

nonn

Author

R. H. Hardin Feb 16 2012

Status

approved