login
The OEIS is supported by
the many generous donors to the OEIS Foundation
.
Hints
(Greetings from
The On-Line Encyclopedia of Integer Sequences
!)
A139676
Number of n X n symmetric binary matrices with all row sums 9.
0
1, 9496, 108306280, 1322299270600
(
list
;
graph
;
refs
;
listen
;
history
;
text
;
internal format
)
OFFSET
9,2
LINKS
Table of n, a(n) for n=9..12.
CROSSREFS
Sequence in context:
A204961
A237104
A156402
*
A291209
A235424
A235420
Adjacent sequences:
A139673
A139674
A139675
*
A139677
A139678
A139679
KEYWORD
nonn
AUTHOR
R. H. Hardin
, Jun 12 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 August 25 21:54 EDT 2024. Contains 375454 sequences. (Running on oeis4.)