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!)
A142418 Primes congruent to 5 mod 49. 1
5, 103, 397, 593, 691, 887, 1181, 1279, 1867, 2063, 2161, 2357, 2749, 3533, 3631, 4219, 4513, 5003, 5101, 5297, 5591, 5689, 6277, 6473, 6571, 7159, 7649, 8237, 8629, 8923, 9413, 9511, 10099, 10589, 10687, 10883, 11177, 11471, 11863, 12157, 12451, 12647 (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) ~ 42n log n. - Charles R Greathouse IV, Jul 03 2016

MATHEMATICA

Select[Prime[Range[2500]], MemberQ[{5}, Mod[#, 49]] &] (* Vincenzo Librandi, Aug 27 2012 *)

Select[Range[5, 13000, 49], PrimeQ] (* Harvey P. Dale, Jan 18 2017 *)

PROG

(MAGMA) [p: p in PrimesUpTo(16000) | p mod 49 eq 5]; // Vincenzo Librandi, Aug 27 2012 *)

(PARI) is(n)=isprime(n) && n%49==5 \\ Charles R Greathouse IV, Jul 03 2016

CROSSREFS

Cf. A000040.

Sequence in context: A266903 A052138 A308459 * A159523 A172116 A007619

Adjacent sequences:  A142415 A142416 A142417 * A142419 A142420 A142421

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 June 6 14:04 EDT 2020. Contains 334827 sequences. (Running on oeis4.)