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Search: id:A093732
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| A093732 |
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Number of connected relations. |
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+0
14
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| 1, 211, 14221, 636331, 23679901, 805351531, 26175881341, 831358677451, 26094426008221, 814105545191851, 25320182311228861, 786251347986776971, 24394981288950302941, 756583120577782494571, 23459491617092461686781
(list; graph; listen)
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OFFSET
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1,2
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REFERENCES
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G. Kreweras, Inversion des polynomes de Bell bidimensionnels et application au denombrement des relations binaires connexes. C. R. Acad. Sci. Paris Ser. A-B 268 1969 A577-A579.
G. Kilibarda and V. Jovovic, "Enumeration of some classes of T_0-hypergraphs", in preparation, 2004.
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FORMULA
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31^n-5*16^n-10*10^n+20*9^n+30*7^n-60*6^n+24*5^n.
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CROSSREFS
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Cf. A005333, A001047, A002501, A002502, A093733.
Sequence in context: A111480 A071367 A069425 this_sequence A116075 A096834 A099687
Adjacent sequences: A093729 A093730 A093731 this_sequence A093733 A093734 A093735
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KEYWORD
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nonn
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AUTHOR
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Goran Kilibarda, Vladeta Jovovic (vladeta(AT)eunet.rs), Apr 14 2004
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