A387808 Number of fundamentally different graceful labelings of the n-sunlet graph.

9, 42, 255, 2283, 27361, 429415, 7871081, 175145752, 4595192873

Offset

3,1

Links

Table of n, a(n) for n=3..11.

Eric Weisstein's World of Mathematics, Graceful Labeling.

Eric Weisstein's World of Mathematics, Sunlet Graph.

Formula

a(n) = A333757(n)/(4*n). - Eric W. Weisstein, Sep 12 2025

Crossrefs

Cf. A333757 (all graceful labelings).

Sequence in context: A074443 A221425 A007227 * A224836 A195975 A185918

Adjacent sequences: A387805 A387806 A387807 * A387809 A387810 A387811

Keyword

nonn,more

Author

Eric W. Weisstein, Sep 08 2025

Extensions

a(11) from Eric W. Weisstein, Sep 18 2025

Status

approved