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Search: id:A005413
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| A005413 |
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Feynman diagrams of order 2n.
(Formerly M4445)
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+0
1
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| 1, 7, 72, 891, 12672, 202770, 3602880, 70425747, 1503484416, 34845294582
(list; graph; listen)
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OFFSET
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1,2
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REFERENCES
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N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
P. Cvitanovic, B. Lautrup and R. B. Pearson, Number and weights of Feynman diagrams, Phys. Rev. D 18 (1978), 1939-1949.
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LINKS
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P. Cvitanovic, B. Lautrup and R. B. Pearson, The number and weights of Feynman diagrams, Phys. Rev. D18, 1939 (1978).
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CROSSREFS
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Sequence in context: A063861 A093632 A077332 this_sequence A137730 A157920 A080794
Adjacent sequences: A005410 A005411 A005412 this_sequence A005414 A005415 A005416
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KEYWORD
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nonn
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com).
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