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A141888 Primes congruent to 2 mod 21. 2
2, 23, 107, 149, 191, 233, 317, 359, 401, 443, 569, 653, 821, 863, 947, 1031, 1283, 1367, 1409, 1451, 1493, 1619, 1787, 1871, 1913, 1997, 2039, 2081, 2207, 2333, 2417, 2459, 2543, 2711, 2753, 2837, 2879, 2963, 3089, 3257, 3299, 3467, 3593, 3677, 3719, 3761 (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) ~ 12n log n. - Charles R Greathouse IV, Jul 02 2016

MATHEMATICA

Select[Prime[Range[600]], Mod[#, 21] == 2&] (* Harvey P. Dale, Jan 04 2011 *)

PROG

(MAGMA) [p: p in PrimesUpTo(4000) | p mod 21 eq 2 ]; // Vincenzo Librandi, Aug 16 2012

(PARI) is(n)=isprime(n) && n%21==2 \\ Charles R Greathouse IV, Jul 02 2016

CROSSREFS

Cf. A000040.

Sequence in context: A141405 A068876 A073175 * A285811 A201851 A034523

Adjacent sequences:  A141885 A141886 A141887 * A141889 A141890 A141891

KEYWORD

nonn,easy

AUTHOR

N. J. A. Sloane, Jul 11 2008

STATUS

approved

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Last modified October 16 20:55 EDT 2019. Contains 328103 sequences. (Running on oeis4.)