login
The OEIS is supported by
the many generous donors to the OEIS Foundation
.
Hints
(Greetings from
The On-Line Encyclopedia of Integer Sequences
!)
A126730
Number of graphs on n nodes with edge chromatic number 4.
0
0, 0, 0, 0, 10, 58, 347, 2130, 14039, 103927
(
list
;
graph
;
refs
;
listen
;
history
;
text
;
internal format
)
OFFSET
1,5
LINKS
Table of n, a(n) for n=1..10.
Keith M. Briggs,
Combinatorial Graph Theory
CROSSREFS
A diagonal of triangle in
A123962
.
Sequence in context:
A242202
A125320
A321112
*
A126478
A223470
A044148
Adjacent sequences:
A126727
A126728
A126729
*
A126731
A126732
A126733
KEYWORD
nonn
AUTHOR
N. J. A. Sloane
, Feb 16 2007
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 28 13:21 EDT 2024. Contains 371254 sequences. (Running on oeis4.)