A141886 - OEIS

A141886

Primes congruent to 17 mod 20.

17, 37, 97, 137, 157, 197, 257, 277, 317, 337, 397, 457, 557, 577, 617, 677, 757, 797, 857, 877, 937, 977, 997, 1097, 1117, 1217, 1237, 1277, 1297, 1597, 1637, 1657, 1697, 1777, 1877, 1997, 2017, 2137, 2237, 2297, 2357, 2377, 2417, 2437, 2477, 2557, 2617, 2657

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 1..1000

FORMULA

a(n) ~ 8n log n. - Charles R Greathouse IV, Jul 02 2016

MATHEMATICA

Select[Range[17, 5000, 20], PrimeQ[#]&] (* Vladimir Joseph Stephan Orlovsky, Mar 31 2011*)

PROG

(Magma) [p: p in PrimesUpTo(3000) | p mod 20 eq 17 ]; // Vincenzo Librandi, Aug 16 2012

(PARI) is(n)=isprime(n) && n%20==17 \\ Charles R Greathouse IV, Jul 02 2016