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Search: id:A075508
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| 1, 10, 109, 1351, 19612, 333451, 6493069, 141264820, 3376695763, 87799365343, 2465959810690, 74353064138749, 2393123710957813, 81812390963020066, 2958191064076428793, 112727516544416978299
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OFFSET
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0,2
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FORMULA
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a(n)=sum((9^(n-m))*S2(n, m), m=1..n), n>=1, with S2(n, m) := A008277(n, m) (Stirling2).
E.g.f.: exp(exp(9*x)-1)/9)-1.
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CROSSREFS
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Cf. A075507, A075509.
Sequence in context: A078922 A082181 A095740 this_sequence A095176 A061749 A105030
Adjacent sequences: A075505 A075506 A075507 this_sequence A075509 A075510 A075511
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KEYWORD
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nonn,easy
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AUTHOR
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Wolfdieter Lang (wolfdieter.lang(AT)physik.uni-karlsruhe.de), Oct 02, 2002
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