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A102700
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Numbers n such that 10n+9 is prime.
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6
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1, 2, 5, 7, 8, 10, 13, 14, 17, 19, 22, 23, 26, 34, 35, 37, 38, 40, 41, 43, 44, 47, 49, 50, 56, 59, 61, 65, 70, 71, 73, 76, 80, 82, 83, 85, 91, 92, 100, 101, 103, 104, 106, 110, 112, 122, 124, 125, 127, 128, 131, 139, 140, 142, 143, 145, 148, 149, 154, 155, 157, 160, 161
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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LINKS
| Chris Caldwell, The first 1,000 primes.
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EXAMPLE
| If n=1, then 10n+9 = 19 (prime)
If n=40, then 10n+9 = 409 (prime)
If n=70, then 10n+9 = 709 (prime)
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MATHEMATICA
| Select[Range[0, 170], PrimeQ[10# + 9] &] (*Chandler*)
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PROG
| (MAGMA) [n: n in [0..3000]| IsPrime(10*n+9)]; // Vincenzo Librandi, Apr 06 2011
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CROSSREFS
| Cf. A030433, A049510.
Sequence in context: A025505 A184793 A034028 * A047481 A158704 A131854
Adjacent sequences: A102697 A102698 A102699 * A102701 A102702 A102703
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KEYWORD
| nonn
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AUTHOR
| Parthasarathy Nambi (PachaNambi(AT)yahoo.com), Feb 04 2005
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EXTENSIONS
| Edited and extended by Ray Chandler (rayjchandler(AT)sbcglobal.net), Nov 07 2006
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