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Search: id:A014898
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| A014898 |
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a(1)=1, a(n)=15*a(n-1)+n. |
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+0
2
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| 1, 17, 258, 3874, 58115, 871731, 13075972, 196139588, 2942093829, 44131407445, 661971111686, 9929566675302, 148943500129543, 2234152501943159, 33512287529147400, 502684312937211016, 7540264694058165257
(list; graph; listen)
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OFFSET
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1,2
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FORMULA
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a(n)=-15/196+15/196*15^n-1/14*n, with n>=1 [From Paolo P. Lava (ppl(AT)spl.at), Jan 14 2009]
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MAPLE
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a:=n->sum((15^(n-j)-1)/14, j=0..n): seq(a(n), n=1..17); - Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Jan 05 2007
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CROSSREFS
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Sequence in context: A098302 A002590 A090457 this_sequence A048446 A001282 A135214
Adjacent sequences: A014895 A014896 A014897 this_sequence A014899 A014900 A014901
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KEYWORD
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nonn
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com), Olivier Gerard (olivier.gerard(AT)gmail.com)
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