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Search: id:A014881
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| A014881 |
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a(1)=1, a(n)=11*a(n-1)+n. |
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+0
2
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| 1, 13, 146, 1610, 17715, 194871, 2143588, 23579476, 259374245, 2853116705, 31384283766, 345227121438, 3797498335831, 41772481694155, 459497298635720, 5054470284992936, 55599173134922313
(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)=-11/100+11/100*11^n-1/10*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(11^(n-j)*j, j=0..n): seq(a(n), n=1..17); - Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Jun 05 2008
a := n-> (Matrix ([[1, 0, 1], [1, 1, 1], [0, 0, 11]])^n)[2, 3]; seq(a(n), n=1..17); [From Alois P. Heinz (heinz(AT)hs-heilbronn.de), Aug 06 2008]
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CROSSREFS
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Sequence in context: A065411 A038492 A152585 this_sequence A048442 A051524 A110748
Adjacent sequences: A014878 A014879 A014880 this_sequence A014882 A014883 A014884
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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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