A140840 Primes of the form 210n+11.

11, 431, 641, 1061, 1481, 1901, 2111, 2531, 2741, 3371, 3581, 4001, 4211, 4421, 5051, 5261, 5471, 6101, 6311, 6521, 7151, 8831, 9041, 9461, 10091, 10301, 11351, 11981, 12401, 12611, 12821, 13241, 13451, 14081, 15131, 15551, 15761, 15971, 16811, 17021

Offset: 1

Author

Juri-Stepan Gerasimov, Jul 04 2008

Keywords

• nonn

Crossrefs

Cf. A073102, A076355.

Programs

Mathematica

Select[210 Range[0, 100] + 11, PrimeQ@ # &]
Select[Range[11,10^4,210],PrimeQ] (* Zak Seidov, Jan 14 2014 *)

Formula

a(n) = 210*A076355(n) + 11. - Zak Seidov, Jan 14 2014

Extensions

I changed the Mathematica coding and extended the sequence. - Robert G. Wilson v, Sep 22 2008