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!)
A142417 Primes congruent to 4 mod 49. 1
53, 151, 347, 641, 739, 1033, 1229, 1327, 1523, 1621, 2111, 2503, 2699, 2797, 3581, 4463, 4561, 5051, 5443, 5639, 5737, 6521, 6619, 7109, 7207, 8089, 8677, 8971, 9461, 10343, 11519, 11617, 11813, 12107, 12401, 13381, 13577, 14557, 14753, 14851, 15439, 15733 (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[{4}, Mod[#, 49]] &] (* Vincenzo Librandi, Aug 27 2012 *)

PROG

(MAGMA) [p: p in PrimesUpTo(16000) | p mod 49 eq 4]; // Vincenzo Librandi, Aug 27 2012

(PARI) is(n)=isprime(n) && n%49==4 \\ Charles R Greathouse IV, Jul 03 2016

CROSSREFS

Cf. A000040.

Sequence in context: A251076 A142043 A175600 * A217718 A044385 A044766

Adjacent sequences:  A142414 A142415 A142416 * A142418 A142419 A142420

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 May 25 20:58 EDT 2020. Contains 334597 sequences. (Running on oeis4.)