login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A142488 Primes congruent to 20 mod 51. 1
71, 173, 479, 683, 887, 1091, 1193, 1499, 1601, 1907, 2111, 2213, 2417, 2621, 2927, 3539, 3947, 4049, 4253, 4457, 4967, 5171, 5273, 5477, 5783, 5987, 6089, 6599, 6701, 6803, 7109, 7211, 7517, 7823, 8231, 8537, 8741, 10067, 10169, 10271, 10781, 10883, 11087 (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) ~ 32n log n. - Charles R Greathouse IV, Jul 03 2016

MATHEMATICA

Select[Prime[Range[2400]], MemberQ[{20}, Mod[#, 51]] &] (* Vincenzo Librandi, Aug 28 2012 *)

Select[Range[20, 12000, 51], PrimeQ] (* Harvey P. Dale, May 10 2015 *)

PROG

(MAGMA) [p: p in PrimesUpTo(13000) | p mod 51 eq 20]; // Vincenzo Librandi, Aug 28 2012

(PARI) is(n)=isprime(n) && n%51==20 \\ Charles R Greathouse IV, Jul 03 2016

CROSSREFS

Cf. A000040.

Sequence in context: A278127 A044403 A044784 * A331008 A068364 A142612

Adjacent sequences:  A142485 A142486 A142487 * A142489 A142490 A142491

KEYWORD

nonn,easy

AUTHOR

N. J. A. Sloane, Jul 11 2008

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified November 28 00:12 EST 2021. Contains 349395 sequences. (Running on oeis4.)