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A242121 Primes modulo 21. 2
2, 3, 5, 7, 11, 13, 17, 19, 2, 8, 10, 16, 20, 1, 5, 11, 17, 19, 4, 8, 10, 16, 20, 5, 13, 17, 19, 2, 4, 8, 1, 5, 11, 13, 2, 4, 10, 16, 20, 5, 11, 13, 2, 4, 8, 10, 1, 13, 17, 19, 2, 8, 10, 20, 5, 11, 17, 19, 4, 8, 10, 20, 13, 17, 19, 2, 16, 1, 11, 13, 17, 2, 10 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

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

MATHEMATICA

Mod[Prime[Range[100]], 21]

PROG

(MAGMA) [p mod(21): p in PrimesUpTo(500)];

(PARI) a(n) = prime(n) % 21; \\ Michel Marcus, May 05 2014

(Sage) [mod(p, 21) for p in primes(500)] # Bruno Berselli, May 05 2014

CROSSREFS

Cf. similar sequences listed in A242119.

Sequence in context: A229786 A242122 A074721 * A242120 A259277 A152073

Adjacent sequences:  A242118 A242119 A242120 * A242122 A242123 A242124

KEYWORD

nonn,easy

AUTHOR

Vincenzo Librandi, May 05 2014

STATUS

approved

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Last modified July 16 11:09 EDT 2020. Contains 335784 sequences. (Running on oeis4.)