A387802 Number of fundamentally different graceful labelings of the n-ladder graph.

1, 1, 16, 177, 2242, 48068, 1235617, 42653229

Offset

1,3

Links

Table of n, a(n) for n=1..8.

Eric Weisstein's World of Mathematics, Graceful Labeling.

Eric Weisstein's World of Mathematics, Ladder Graph.

Formula

a(n) = A333719(n)/8 for n > 2. - Eric W. Weisstein, Sep 12 2025

Crossrefs

Cf. A333719 (all graceful labelings).

Sequence in context: A323856 A226507 A264297 * A002399 A255255 A181239

Adjacent sequences: A387799 A387800 A387801 * A387803 A387804 A387805

Keyword

nonn,more

Author

Eric W. Weisstein, Sep 08 2025

Extensions

a(8) from Eric W. Weisstein, Dec 31 2025

Status

approved