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A308549 Number of connected graceful graphs on n vertices. 0
1, 1, 2, 6, 18, 106, 819, 10969 (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, Connected Graph

Eric Weisstein's World of Mathematics, Graceful Graph

Eric Weisstein's World of Mathematics, Vertex Count

EXAMPLE

1 node: K_1

2 nodes: P_2

3 nodes: P_3, C_3

4 nodes: K_1,3 (claw), K_4-e, P_4, paw graph, C_4, K_4

5 nodes: K_2,3, K_1,1,3, K_1,1,1,2, P_5, S_5, W_5 (and 12 more)

CROSSREFS

Sequence in context: A162063 A162064 A162056 * A212653 A323104 A208456

Adjacent sequences:  A308546 A308547 A308548 * A308550 A308551 A308552

KEYWORD

nonn,more

AUTHOR

Eric W. Weisstein, Jun 06 2019

EXTENSIONS

a(8) from Eric W. Weisstein, Aug 16 2019

STATUS

approved

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Last modified September 20 05:51 EDT 2019. Contains 327212 sequences. (Running on oeis4.)