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Search: id:A068815
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| A068815 |
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Primes with a 4 followed by 1's. |
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+0
1
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| 41, 4111, 41111111111111, 41111111111111111111111111, 4111111111111111111111111111111111111111111111111111111111111111111111111, 41111111111111111111111111111111111111111111111111111111111111111111111111111111\ 11111111111111111111111111111
(list; graph; listen)
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OFFSET
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1,1
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PROGRAM
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(PARI) for(n=1, 200, if(isprime(4*10^n+(10^(n)-1)/9)==1, print1(4*10^n+(10^(n)-1)/9, ", ")))
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CROSSREFS
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Sequence in context: A080178 A167246 A107690 this_sequence A093174 A159992 A101830
Adjacent sequences: A068812 A068813 A068814 this_sequence A068816 A068817 A068818
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KEYWORD
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nonn
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AUTHOR
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Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Mar 07 2002
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EXTENSIONS
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More terms from Benoit Cloitre (benoit7848c(AT)orange.fr), Mar 09 2002
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