login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A166773 Number of nX7 1..2 arrays containing at least one of each value, and all equal values connected. 0
12, 182, 3518, 67756, 1284728 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..5.

EXAMPLE

Some solutions for n=3

...2.2.2.2.2.2.1...2.2.2.1.1.1.1...2.2.2.2.2.2.2...2.2.2.2.2.2.2

...2.2.2.1.1.1.1...2.2.2.1.1.1.1...2.2.2.2.1.2.2...1.1.2.2.1.2.1

...2.2.1.1.1.1.1...2.2.1.1.1.1.1...2.2.1.1.1.2.2...1.1.1.1.1.1.1

------

...2.2.2.2.2.2.2...2.2.2.2.2.2.2...2.2.2.2.2.2.2...2.2.2.2.2.1.1

...2.2.1.2.1.1.2...2.1.1.2.2.2.2...2.1.1.1.1.2.2...1.2.1.1.1.1.1

...2.1.1.1.1.1.1...1.1.1.1.1.1.2...1.1.1.1.1.1.2...1.1.1.1.1.1.1

CROSSREFS

Sequence in context: A013924 A145560 A230345 * A202632 A285410 A218886

Adjacent sequences:  A166770 A166771 A166772 * A166774 A166775 A166776

KEYWORD

nonn

AUTHOR

R. H. Hardin Oct 21 2009

STATUS

approved

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified January 24 07:18 EST 2020. Contains 331189 sequences. (Running on oeis4.)