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A093011
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Primes of the form 10*R_n + 3, where R_n is the repunit (A002275) of length n.
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3
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3, 13, 113, 11113, 111111113, 11111111113, 111111111111111111111113, 111111111111111111111111111111111111111111111111111111111111111111111111111111111113
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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COMMENTS
| Primes of the form 2+(10^n-1)/9, n>0. - Vincenzo Librandi, Dec 13 2011
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LINKS
| Vincenzo Librandi, Table of n, a(n) for n = 1..9
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MATHEMATICA
| Select[Table[(((10^n-1)/ 9)+2), {n, 1, 900}], PrimeQ] (* Vincenzo Librandi, Dec 13 2011 *)
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PROG
| (MAGMA) [a: n in [1..100] | IsPrime(a) where a is ((10^n-1) div 9)+2 ]; // Vincenzo Librandi, Dec 13 2011
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CROSSREFS
| Cf. A056654 (corresponding n).
Sequence in context: A053583 A077713 A119723 * A057865 A121921 A191955
Adjacent sequences: A093008 A093009 A093010 * A093012 A093013 A093014
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KEYWORD
| nonn
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AUTHOR
| Rick L. Shepherd (rshepherd2(AT)hotmail.com), Mar 14 2004
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