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A005414 Feynman diagrams of order 2n.
(Formerly M4906)
0
1, 1, 13, 93, 1245, 18093, 308605, 5887453, 124221373, 2864305277 (list; graph; refs; listen; history; internal format)
OFFSET

1,3

REFERENCES

P. Cvitanovic, B. Lautrup and R. B. Pearson, Number and weights of Feynman diagrams, Phys. Rev. D 18 (1978), 1939-1949.

N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).

LINKS

P. Cvitanovic, B. Lautrup and R. B. Pearson, The number and weights of Feynman diagrams, Phys. Rev. D18, 1939 (1978).

CROSSREFS

Sequence in context: A027670 A055608 A038742 * A044264 A044645 A153703

Adjacent sequences:  A005411 A005412 A005413 * A005415 A005416 A005417

KEYWORD

nonn

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com).

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Last modified February 14 10:24 EST 2012. Contains 205614 sequences.