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A308556 Number of (not necessarily connected) ungraceful graphs on n nodes. 2
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: A059412 A079472 A366590 * 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

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Last modified June 5 22:26 EDT 2024. Contains 373110 sequences. (Running on oeis4.)