login
This site is supported by donations to The OEIS Foundation.

 

Logo

Please make a donation to keep the OEIS running. We are now in our 55th year. In the past year we added 12000 new sequences and reached 8000 citations (which often say "discovered thanks to the OEIS"). We need to raise money to hire someone to manage submissions, which would reduce the load on our editors and speed up editing.
Other ways to donate

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A142382 Primes congruent to 31 mod 47. 1
31, 313, 877, 971, 1723, 2099, 2287, 2381, 2663, 2851, 3697, 4073, 4261, 4637, 4919, 5107, 5483, 5953, 6047, 6329, 7457, 7927, 8209, 8867, 9337, 9431, 9619, 9901, 10559, 11311, 11593, 11969, 12157, 12251, 12721, 13003, 13567, 15259, 15541, 15823, 16481 (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) ~ 46n log n. - Charles R Greathouse IV, Jul 03 2016

MATHEMATICA

Select[Prime[Range[2500]], MemberQ[{31}, Mod[#, 47]] &] (* Vincenzo Librandi, Aug 27 2012 *)

PROG

(MAGMA) [p: p in PrimesUpTo(18000) | p mod 47 eq 31]; // Vincenzo Librandi, Aug 27 2012 *)

(PARI) is(n)=isprime(n) && n%47==31 \\ Charles R Greathouse IV, Jul 03 2016

CROSSREFS

Cf. A000040.

Sequence in context: A126552 A068813 A221306 * A137318 A182025 A221189

Adjacent sequences:  A142379 A142380 A142381 * A142383 A142384 A142385

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 December 12 15:11 EST 2019. Contains 329960 sequences. (Running on oeis4.)