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A086564
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Smallest k such that 10^k + 1 has n distinct prime divisors.
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0
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0, 4, 3, 11, 9, 36, 15, 33, 39, 69, 63, 45, 171, 117, 243, 105, 150, 135, 165, 255, 231, 210
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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COMMENTS
| All subsequent terms are > 71. - David Wasserman (wasserma(AT)spawar.navy.mil), Mar 28 2005
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FORMULA
| a(n) = Log to the base 10 of {A086563(n)-1}.
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EXAMPLE
| a(5) = 9 = Log to the base 10 {1000000001 - 1}.
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CROSSREFS
| Cf. A086563.
Sequence in context: A100492 A072183 A005013 * A200073 A080777 A001166
Adjacent sequences: A086561 A086562 A086563 * A086565 A086566 A086567
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KEYWORD
| more,nonn
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AUTHOR
| Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Aug 31 2003
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EXTENSIONS
| More terms from Sascha Kurz (sascha.kurz(AT)uni-bayreuth.de), Sep 22 2003
a(10)-a(12) from David Wasserman (wasserma(AT)spawar.navy.mil), Mar 28 2005
a(13)-a(22) from Max Alekseyev (maxale(AT)gmail.com), Apr 27 2010
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