A122739 - OEIS

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A122739

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

0

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

(list; graph; refs; listen; history; text; internal format)

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

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