A387796 Number of fundamentally different graceful labelings of the n-cycle graph.

1, 1, 0, 0, 6, 12, 0, 0, 104, 246, 0, 0, 3882, 10282, 0, 0, 212392, 602270, 0, 0, 16746039, 53699700, 0, 0

Offset

3,5

Links

Table of n, a(n) for n=3..26.

Eric Weisstein's World of Mathematics, Cycle Graph.

Eric Weisstein's World of Mathematics, Graceful Labeling.

Formula

a(n) = A333720(n)/(4*n). - Eric W. Weisstein, Sep 12 2025

Crossrefs

Cf. A333720 (all graceful labelings).

Sequence in context: A145746 A024267 A028584 * A243017 A084342 A243045

Adjacent sequences: A387793 A387794 A387795 * A387797 A387798 A387799

Keyword

nonn,more

Author

Eric W. Weisstein, Sep 08 2025

Status

approved