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Search: id:A053420
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| A053420 |
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Number of 4-multigraphs on n nodes. |
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+0
3
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| 1, 5, 35, 900, 90005, 43571400, 95277592625, 925609100039625, 40119721052610123750, 7833164300852979350336250, 6953552738579427778531249187500
(list; graph; listen)
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OFFSET
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1,2
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REFERENCES
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F. Harary and E. M. Palmer, Graphical Enumeration, Academic Press, NY, 1973.
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LINKS
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Harald Fripertinger, The cycle type of the induced action on 2-subsets
Vladeta Jovovic, Formulae for the number T(n,k) of n-multigraphs on k nodes
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CROSSREFS
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Cf. A000088, A004102, A053400. A row of A063841.
Sequence in context: A089043 A034236 A058015 this_sequence A001802 A122590 A057991
Adjacent sequences: A053417 A053418 A053419 this_sequence A053421 A053422 A053423
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KEYWORD
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easy,nonn
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AUTHOR
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Vladeta Jovovic (vladeta(AT)eunet.rs), Jan 11 2000
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