A326747 Number of graceful labelings of the n-crown graph.

0, 0, 0, 2592, 33120, 164160, 0

Offset

1,4

Links

Table of n, a(n) for n=1..7.

Eric Weisstein's World of Mathematics, Crown Graph

Eric Weisstein's World of Mathematics, Graceful Labeling

Formula

a(n) = 4*n!*A387888(n). - Eric W. Weisstein, Sep 12 2025

Crossrefs

Cf. A387888 (fundamentally different labelings).

Sequence in context: A391011 A179702 A258728 * A156322 A096298 A204782

Adjacent sequences: A326744 A326745 A326746 * A326748 A326749 A326750

Keyword

nonn,bref,more

Author

Eric W. Weisstein, Jul 06 2020

Extensions

a(1)-a(2) prepended and a(6)-a(7) added by Eric W. Weisstein, Sep 12 2025

Status

approved