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A106009 Primes p such that 20*p +/- 3 are primes. 0
2, 5, 13, 23, 43, 61, 83, 89, 107, 173, 181, 223, 233, 313, 317, 349, 379, 467, 523, 659, 673, 727, 769, 811, 911, 971, 1009, 1051, 1069, 1097, 1153, 1279, 1321, 1433, 1451, 1549, 1559, 1583, 1693, 1777, 1861, 1993, 2029, 2063, 2137, 2213, 2267, 2357, 2441 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..49.

MATHEMATICA

Select[Prime[Range[200]], PrimeQ[20#+3]&&PrimeQ[20#-3]&]

PROG

(MAGMA) [p: p in PrimesUpTo(2500) | IsPrime(20*p-3) and IsPrime(20*p+3)]; [From Vincenzo Librandi, Nov 13 2010]

CROSSREFS

Sequence in context: A049779 A281906 A256491 * A194552 A079780 A178621

Adjacent sequences:  A106006 A106007 A106008 * A106010 A106011 A106012

KEYWORD

nonn

AUTHOR

Zak Seidov, May 05 2005

STATUS

approved

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Last modified August 18 14:32 EDT 2017. Contains 290720 sequences.