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Search: id:A134817
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| A134817 |
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a(1)=1; a(n)=a(n-1)*(number of digits of a(n-1))+1. |
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+0
1
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| 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 21, 43, 87, 175, 526, 1579, 6317, 25269, 126346, 758077, 4548463, 31839242, 254713937, 2292425434, 22924254341, 252166797752, 3026001573025, 39338020449326, 550732286290565, 8260984294358476
(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) =a(n-1)*floor(log(a(n-1))+1)+1
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MATHEMATICA
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a = {1}; Do[AppendTo[a, a[[ -1]]*Length[IntegerDigits[a[[ -1]]]] + 1], {40}]; a - Stefan Steinerberger (stefan.steinerberger(AT)gmail.com), Jan 30 2008
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CROSSREFS
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Adjacent sequences: A134814 A134815 A134816 this_sequence A134818 A134819 A134820
Sequence in context: A061511 A138142 A085890 this_sequence A067581 A098786 A099469
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KEYWORD
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nonn
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AUTHOR
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Rolf Pleisch (r_pleisch(AT)gmx.ch), Jan 28 2008
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EXTENSIONS
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More terms from Stefan Steinerberger (stefan.steinerberger(AT)gmail.com), Jan 30 2008
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