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!)
A147142 Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 1000-1100-0110-0011 pattern in any orientation. 0
1, 1, 1, 3, 7, 17, 39, 127, 681, 3913, 21369, 147701, 1344439, 15252227, 199338371, 3018576265, 55990200331, 1283966558111, 35424143775231 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,4
LINKS
EXAMPLE
Maximal 8 X 8 example
.0.0.0.0.1.1.0.0
.0.0.0.0.0.1.1.0
.0.0.0.0.0.0.1.1
.0.0.0.0.1.1.0.1
.1.0.0.1.0.1.1.0
.1.1.0.1.1.0.1.1
.0.1.1.0.1.1.0.1
.0.0.1.1.0.1.1.0
CROSSREFS
Sequence in context: A229514 A077927 A005197 * A298371 A367396 A106472
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 March 29 11:45 EDT 2024. Contains 371278 sequences. (Running on oeis4.)