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A165439 Primes p such that 3+2*(sum of digits of p) is also a prime 2
2, 5, 7, 11, 13, 17, 19, 23, 31, 37, 41, 43, 53, 59, 61, 67, 71, 73, 89, 101, 103, 107, 109, 113, 127, 131, 139, 149, 151, 157, 163, 167, 179, 181, 193, 197, 199, 211, 223, 229, 233, 239, 241, 251, 257, 269, 271, 283, 293, 307, 311, 313, 331, 337, 347, 359, 373 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Bruno Berselli, Table of n, a(n) for n = 1..1000

EXAMPLE

331 is in the sequence because 3+3+1=7 and 2*7+3=17 is prime.

MATHEMATICA

Select[Prime[Range[200]], PrimeQ[2 Total[IntegerDigits[#]]+3]&] (* Harvey P. Dale, Jul 14 2011 *)

PROG

(MAGMA) [ p: p in PrimesUpTo(400) | IsPrime(q) where q is 3+2*(&+Intseq(p))];  // Bruno Berselli, Jul 15 2011

CROSSREFS

Cf. A165440, A007605.

Sequence in context: A045344 A087685 A020619 * A228200 A245063 A168033

Adjacent sequences:  A165436 A165437 A165438 * A165440 A165441 A165442

KEYWORD

nonn,base

AUTHOR

Vincenzo Librandi, Sep 19 2009

EXTENSIONS

Keyword:base added by R. J. Mathar, Oct 12 2009

STATUS

approved

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Last modified April 18 22:45 EDT 2021. Contains 343098 sequences. (Running on oeis4.)