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A141889 Primes congruent to 4 mod 21. 1
67, 109, 151, 193, 277, 487, 571, 613, 739, 823, 907, 991, 1033, 1117, 1201, 1327, 1453, 1579, 1621, 1663, 1747, 1789, 1831, 1873, 1999, 2083, 2251, 2293, 2377, 2503, 2671, 2713, 2797, 3049, 3217, 3259, 3301, 3343, 3469, 3511, 3637, 3847, 3889, 3931, 4057 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
FORMULA
a(n) ~ 12n log n. - Charles R Greathouse IV, Jul 03 2016
MATHEMATICA
Select[Range[4, 5000, 21], PrimeQ] (* Vladimir Joseph Stephan Orlovsky, Apr 03 2011*)
PROG
(Magma) [p: p in PrimesUpTo(6000) | p mod 21 eq 4 ]; // Vincenzo Librandi, Aug 16 2012
(PARI) is(n)=isprime(n) && n%21==4 \\ Charles R Greathouse IV, Jul 03 2016
CROSSREFS
Sequence in context: A180521 A139511 A142193 * A289518 A229058 A141925
KEYWORD
nonn,easy
AUTHOR
N. J. A. Sloane, Jul 11 2008
STATUS
approved

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Last modified March 28 07:33 EDT 2024. Contains 371235 sequences. (Running on oeis4.)