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A092794
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Number of connected relations.
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0
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1, 21, 265, 2733, 25441, 223461, 1895545, 15736413, 128882641, 1046542101, 8451838825, 68020609293, 546227922241, 4380272835141, 35094966838105, 281025802973373, 2249545355064241, 18003091856638581, 144058517372685385
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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REFERENCES
| G. Kilibarda and V. Jovovic, "Enumeration of some classes of T_0-hypergraphs", in preparation, 2004.
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FORMULA
| 8^n-3*5^n+2*4^n.
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CROSSREFS
| Cf. A005333, A001047, A002501, A002502, A093732, A093733.
Sequence in context: A135122 A045505 A169895 * A133717 A056282 A000770
Adjacent sequences: A092791 A092792 A092793 * A092795 A092796 A092797
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KEYWORD
| nonn
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AUTHOR
| Goran Kilibarda, Vladeta Jovovic (vladeta(AT)eunet.rs), Apr 15 2004
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