login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A308556 Number of (not necessarily connected) ungraceful graphs on n nodes. 1
0, 1, 2, 4, 12, 30, 85, 300 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

Table of n, a(n) for n=1..8.

Eric Weisstein's World of Mathematics, Graceful Graph

CROSSREFS

Cf. A308557 (connected ungraceful graphs).

Sequence in context: A083554 A059412 A079472 * A148186 A006948 A148187

Adjacent sequences:  A308553 A308554 A308555 * A308557 A308558 A308559

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 | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified February 24 09:40 EST 2020. Contains 332209 sequences. (Running on oeis4.)