login
The OEIS is supported by
the many generous donors to the OEIS Foundation
.
Hints
(Greetings from
The On-Line Encyclopedia of Integer Sequences
!)
A221961
Number of n X n symmetric lonesum ternary matrices.
2
1, 3, 18, 149, 1390, 13377
(
list
;
graph
;
refs
;
listen
;
history
;
text
;
internal format
)
OFFSET
0,2
LINKS
Table of n, a(n) for n=0..5.
H. K. Kim, D. S. Krotov and J. Y. Lee,
Matrices uniquely determined by their lonesums
, Linear Algebra and its Applications, 438 (2013) no 7, 3107-3123
FORMULA
Kim et al. (2013) give a formula.
CROSSREFS
Cf.
A000629
(the binary case).
See also
A299906
,
A299907
for the general binary case.
Sequence in context:
A371825
A240921
A373771
*
A138420
A152409
A200320
Adjacent sequences:
A221958
A221959
A221960
*
A221962
A221963
A221964
KEYWORD
nonn
,
more
AUTHOR
N. J. A. Sloane
, Feb 05 2013
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 01:19 EDT 2024. Contains 375418 sequences. (Running on oeis4.)