A106090 Prime numbers p such that 10p+7 and 7p+10 are primes.

3, 13, 31, 67, 79, 109, 163, 223, 229, 241, 277, 367, 379, 421, 433, 439, 463, 523, 541, 571, 673, 757, 787, 829, 853, 937, 967, 1117, 1237, 1249, 1321, 1399, 1453, 1489, 1549, 1609, 1741, 1747, 1759, 1783, 1861, 1879, 2011, 2089, 2137, 2161, 2239, 2293

Offset

1,1

Comments

Primes in A124825.

Links

Table of n, a(n) for n=1..48.

Mathematica

Select[Prime[Range[220]], PrimeQ[10#+7]&&PrimeQ[7#+10]&]

Crossrefs

Cf. A124825.

Sequence in context: A146728 A082709 A154833 * A067980 A164569 A007686

Adjacent sequences: A106087 A106088 A106089 * A106091 A106092 A106093

Keyword

nonn

Author

Zak Seidov, May 07 2005, Nov 09 2006

Extensions

Edited by N. J. A. Sloane, Jul 03 2008 at the suggestion of R. J. Mathar

Status

approved