A387825 Number of fundamentally different graceful labelings of the n-wheel graph.

1, 4, 12, 23, 67, 251, 1842, 10792, 59880, 439883, 3518764, 29272221

Offset

4,2

Links

Table of n, a(n) for n=4..15.

Eric Weisstein's World of Mathematics, Graceful Labeling.

Eric Weisstein's World of Mathematics, Wheel Graph.

Formula

a(n) = A387825(n)/(4*(n - 1)) for n > 4. - Eric W. Weisstein, Sep 12 2025

Crossrefs

Cf. A333672 (total number of labelings).

Sequence in context: A009905 A008047 A008065 * A321685 A156678 A277513

Adjacent sequences: A387822 A387823 A387824 * A387826 A387827 A387828

Keyword

nonn,more

Author

Eric W. Weisstein, Sep 09 2025

Status

approved