A207240 Number of nX6 0..1 arrays avoiding 0 0 0 and 0 1 1 horizontally and 0 0 1 and 0 1 0 vertically

18, 324, 1526, 7165, 40838, 197256, 886959, 4132837, 18825154, 83118767, 366894032, 1612009910, 7003691520, 30295384994, 130694823493, 561304207068, 2402966839572, 10265912202332, 43759103277417, 186155560434801

Offset

1,1

Comments

Column 6 of A207242

Links

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

Example

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

Crossrefs

Sequence in context: A187381 A207109 A207465 * A207498 A285878 A171292

Adjacent sequences: A207237 A207238 A207239 * A207241 A207242 A207243

Keyword

nonn

Author

R. H. Hardin Feb 16 2012

Status

approved