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Search: id:A133836
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| A133836 |
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Largest prime with number of decimal digits equal to n-th prime. |
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+0
1
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| 97, 997, 99991, 9999991, 99999999977, 9999999999971, 99999999999999997, 9999999999999999961, 99999999999999999999977, 99999999999999999999999999973, 9999999999999999999999999999973
(list; graph; listen)
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OFFSET
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1,1
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FORMULA
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a(n)=A003618(A000040(n)). - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Jan 30 2008
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EXAMPLE
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97 is the largest prime with 2 digits.
997 is the largest prime with 3 digits.
99991 is the largest prime with 5 digits.
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MAPLE
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A003618 := proc(n) prevprime(10^n) ; end: A133836 := proc(n) A003618(ithprime(n)) ; end: for n from 1 to 13 do printf("%d, ", A133836(n) ) ; od: - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Jan 30 2008
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CROSSREFS
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Cf. A000040, A064490.
Sequence in context: A127748 A127828 A087596 this_sequence A038532 A092272 A020538
Adjacent sequences: A133833 A133834 A133835 this_sequence A133837 A133838 A133839
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KEYWORD
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nonn,base
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AUTHOR
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Parthasarathy Nambi (PachaNambi(AT)yahoo.com), Jan 06 2008
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EXTENSIONS
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More terms from R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Jan 30 2008
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