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Search: id:A007131
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| A007131 |
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Number of unlabeled connected strength 3 Eulerian graphs with n nodes.
(Formerly M1990)
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+0
2
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| 0, 2, 10, 162, 6218, 739198, 292320730, 393805101318, 1834614855993394, 30008091277676005830, 1747116355298560745383906, 366330007995516101568779931526, 279347436837102450848968821962591698
(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).
R. W. Robinson, personal communication.
R. W. Robinson, Numerical implementation of graph counting algorithms, AGRC Grant, Math. Dept., Univ. Newcastle, Australia, 1979.
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LINKS
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R. W. Robinson, Table of n, a(n) for n = 1..22
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CROSSREFS
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Sequence in context: A007080 A134088 A076659 this_sequence A126449 A126451 A132341
Adjacent sequences: A007128 A007129 A007130 this_sequence A007132 A007133 A007134
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KEYWORD
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nonn,nice
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com).
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