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A102342
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Numbers n such that 10n+7 is prime.
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8
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0, 1, 3, 4, 6, 9, 10, 12, 13, 15, 16, 19, 22, 25, 27, 30, 31, 33, 34, 36, 39, 45, 46, 48, 54, 55, 57, 58, 60, 61, 64, 67, 72, 75, 78, 79, 82, 85, 87, 88, 90, 93, 94, 96, 97, 99, 108, 109, 111, 118, 121, 123, 127, 129, 130, 132, 136, 142, 144, 148, 156, 159, 160, 162, 163
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,3
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EXAMPLE
| If n=1, then 10n+7 = 17 (prime).
If n=48, then 10n+7 = 487 (prime).
If n=99, then 10n+7 = 997 (prime).
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MATHEMATICA
| Select[Range[0, 170], PrimeQ[10# + 7] &] (*Chandler*)
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PROG
| (MAGMA) [n: n in [0..3000]| IsPrime(10*n+7)]; // Vincenzo Librandi, Apr 06 2011
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CROSSREFS
| Cf. A030432, A049509.
Sequence in context: A173671 A080710 A115837 * A014419 A138670 A080336
Adjacent sequences: A102339 A102340 A102341 * A102343 A102344 A102345
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KEYWORD
| nonn
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AUTHOR
| Parthasarathy Nambi (PachaNambi(AT)yahoo.com), Feb 20 2005
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EXTENSIONS
| Edited and extended by Ray Chandler (rayjchandler(AT)sbcglobal.net), Nov 07 2006
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