The OEIS mourns the passing of Jim Simons and is grateful to the Simons Foundation for its support of research in many branches of science, including the OEIS.
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!)
A308557 Number of connected ungraceful graphs on n nodes. 1
0, 0, 0, 0, 3, 6, 34, 148 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,5
LINKS
Table of n, a(n) for n=1..8.
Eric Weisstein's World of Mathematics, Graceful Graph
CROSSREFS
Cf. A308556 (not necessarily connected ungraceful graphs).
Sequence in context: A186750 A203715 A249875 * A134748 A068904 A309774
Adjacent sequences: A308554 A308555 A308556 * A308558 A308559 A308560
KEYWORD
nonn,more
AUTHOR
Eric W. Weisstein, Jun 07 2019
EXTENSIONS
a(8) from Eric W. Weisstein, Aug 16 2019
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 May 23 11:57 EDT 2024. Contains 372763 sequences. (Running on oeis4.)