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A333727

Total number of graceful labelings of all simple graphs on n nodes.

0

1, 2, 16, 144, 1428, 25328, 631026, 25087224

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,2

LINKS

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

Eric Weisstein's World of Mathematics, Graceful Labeling

Eric Weisstein's World of Mathematics, Simple Graph

CROSSREFS

Sequence in context: A003768 A214767 A300412 * A024915 A162440 A337793

Adjacent sequences: A333724 A333725 A333726 * A333728 A333729 A333730

KEYWORD

nonn,more,hard

AUTHOR

Eric W. Weisstein, Apr 03 2020

EXTENSIONS

a(8) from Eric W. Weisstein, Jul 30 2020

STATUS

approved