A106073 - OEIS

A106073

Primes p such that 3*p+20 and 20*p+3 are primes.

11, 13, 23, 37, 43, 53, 71, 79, 83, 127, 167, 179, 181, 191, 193, 233, 251, 281, 307, 317, 421, 433, 487, 571, 617, 653, 659, 673, 739, 809, 881, 907, 911, 1033, 1049, 1093, 1103, 1117, 1187, 1201, 1259, 1297, 1399, 1423, 1451, 1499, 1553, 1667, 1693, 1709

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OFFSET

1,1

LINKS

Table of n, a(n) for n=1..50.

MATHEMATICA

Select[Prime[Range[220]], PrimeQ[20#+3]&&PrimeQ[3#+20]&]

PROG

(Magma) [p: p in PrimesUpTo(10000)| IsPrime(3*p+20) and IsPrime(20*p+3)] // Vincenzo Librandi, Nov 13 2010

CROSSREFS

Sequence in context: A370011 A048393 A136058 * A072330 A097933 A166484

Adjacent sequences: A106070 A106071 A106072 * A106074 A106075 A106076

KEYWORD

nonn

AUTHOR

Zak Seidov, May 07 2005

STATUS

approved