A333719 Number of graceful labelings of the n-ladder graph.

2, 16, 128, 1416, 17936, 384544

Offset

1,1

Links

Table of n, a(n) for n=1..6.

Eric Weisstein's World of Mathematics, Graceful Labeling

Eric Weisstein's World of Mathematics, Ladder Graph

Crossrefs

Sequence in context: A270924 A371814 A214623 * A161737 A171451 A012459

Adjacent sequences: A333716 A333717 A333718 * A333720 A333721 A333722

Keyword

nonn,more

Author

Eric W. Weisstein, Apr 03 2020

Extensions

a(6) from Pontus von Brömssen, Jul 25 2020

Status

approved