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A064732 Number of labeled Hugenholtz diagrams with n nodes. 0
1, 3, 39, 840, 27300, 1232280, 73564470 (list; graph; refs; listen; history; internal format)
OFFSET

2,2

REFERENCES

P. D. Stevenson, "Automatic Generation of Vacuum Amplitude Many-Body Perturbation Series", Int. J. Mod. Phys. C 14, 1135 (2003)

A. Szabo and N. S. Ostlund, "Modern Quantum Chemistry", Dover, Mineola, New York (1996).

CROSSREFS

Cf. A057572.

Sequence in context: A014850 A104209 A121247 * A092610 A082159 A187536

Adjacent sequences:  A064729 A064730 A064731 * A064733 A064734 A064735

KEYWORD

hard,nonn

AUTHOR

Paul Stevenson (p.stevenson(AT)surrey.ac.uk), Oct 17 2001

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Last modified February 16 11:51 EST 2012. Contains 205908 sequences.