login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A207087 Number of nX7 0..1 arrays avoiding 0 0 0 horizontally and 0 0 1 vertically 1
81, 6561, 248525, 8244759, 243794389, 6897033117, 189659424011, 5142718466575, 138294979168509, 3702335938084439, 98860585328779343, 2635998227067669263, 70227731343750962247, 1870120121498081593459, 49786813201495602614131 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 7 of A207088
LINKS
EXAMPLE
Some solutions for n=4
..1..0..1..0..1..0..1....1..1..0..0..1..1..1....0..0..1..0..1..1..1
..0..0..1..0..0..1..0....1..1..1..1..1..0..1....1..1..1..1..0..0..1
..0..0..1..0..1..0..1....0..0..1..1..0..1..1....0..1..1..0..1..0..0
..0..0..1..0..0..1..0....0..0..1..0..0..1..1....1..0..1..1..1..0..0
CROSSREFS
Sequence in context: A181223 A223977 A188565 * A207181 A188752 A223572
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 15 2012
STATUS
approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified July 13 09:13 EDT 2024. Contains 374274 sequences. (Running on oeis4.)