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!)
A146794 Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 0110-0100-1111 pattern in any orientation. 0
1, 1, 1, 1, 1, 5, 17, 41, 145, 657, 4553, 32425, 257569, 2670753, 36201945, 564616361, 10290347089, 235475912465, 6833463711081, 238928359316057, 9863518167137825 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,6
LINKS
EXAMPLE
Maximal 8 X 8 example
.0.0.1.1.1.1.0.0
.0.0.0.1.0.0.0.0
.1.0.0.1.1.0.0.1
.1.1.1.0.0.1.0.1
.1.0.1.0.0.1.1.1
.1.0.0.1.1.0.0.1
.0.0.0.0.1.0.0.0
.0.0.1.1.1.1.0.0
CROSSREFS
Sequence in context: A139562 A201599 A246636 * A146834 A130739 A147412
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 04 2008
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 February 25 16:38 EST 2024. Contains 370332 sequences. (Running on oeis4.)