A122739 Numbers of perifusenes with one internal vertex (see Cyvin et al. for precise definition).

1, 1, 6, 24, 109, 477, 2155, 9647, 43621, 197767, 901436, 4125636, 18964119

Offset

3,3

Links

Table of n, a(n) for n=3..15.

S. J. Cyvin, F. Zhang and J. Brunvoll, Enumeration of perifusenes with one internal vertex: A complete mathematical solution, J. Math. Chem., 11 (1992), 283-292.

Formula

a(n) = A038380(n) for n >= 3. - Georg Fischer, Nov 02 2018

Crossrefs

Cf. A038380.

Sequence in context: A026962 A026972 A075484 * A038380 A052745 A187668

Adjacent sequences: A122736 A122737 A122738 * A122740 A122741 A122742

Keyword

nonn

Author

N. J. A. Sloane, Sep 24 2006

Status

approved