Logo

Greetings from The On-Line Encyclopedia of Integer Sequences!

Hints

Search: id:A057572
Displaying 1-1 of 1 results found. page 1
     Format: long | short | internal | text      Sort: relevance | references | number      Highlight: on | off
A057572 Number of unlabeled Hugenholz diagrams with n nodes. +0
2
1, 1, 12, 148, 3150, 90075, 3431015 (list; graph; listen)
OFFSET

1,3

COMMENT

Hugenholz diagrams are a way of expressing terms in the quantum mechanical many-body perturbation theory.

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. Ostlund, Modern Quantum Chemistry, Dover Publications, New York, 1996

CROSSREFS

Sequence in context: A039493 A167138 A001406 this_sequence A114106 A015610 A141326

Adjacent sequences: A057569 A057570 A057571 this_sequence A057573 A057574 A057575

KEYWORD

hard,nonn

AUTHOR

Paul D. Stevenson (p.stevenson(AT)surrey.ac.uk), Nov 28 2000

page 1

Search completed in 0.002 seconds

Lookup | Welcome | Find friends | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Transforms | Puzzles | Hot | Classics
More pages | Superseeker | Maintained by N. J. A. Sloane (njas@research.att.com)

Last modified November 25 14:49 EST 2009. Contains 167514 sequences.


AT&T Labs Research