A064732 Number of labeled Hugenholtz diagrams with n nodes.

1, 3, 39, 840, 27300, 1232280, 73564470, 5607372960, 531209621880

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).

Links

Table of n, a(n) for n=2..10.

C. Drischler, K. Hebeler, and A. Schwenk, Chiral interactions up to N3LO and nuclear saturation, arXiv:1710.08220 [nucl-th], 2017.

Sean A. Irvine, Java program (github)

A. Tichai, J. Langhammer, S. Binder, and R. Roth, Hartree-Fock Many-Body Perturbation Theory for Nuclear Ground-States, arXiv preprint arXiv:1601.03703 [nucl-th], 2016.

Crossrefs

Cf. A057572.

Sequence in context: A370327 A104209 A121247 * A092610 A301585 A258923

Adjacent sequences: A064729 A064730 A064731 * A064733 A064734 A064735

Keyword

hard,nonn,more

Author

Paul Stevenson, Oct 17 2001

Extensions

a(9)-a(10) from Sean A. Irvine, Jun 21 2022

Status

approved