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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A142679 Primes congruent to 23 mod 57. 2
23, 137, 251, 479, 593, 821, 1049, 1163, 1277, 1619, 1733, 1847, 2417, 2531, 3329, 3557, 3671, 4013, 4127, 4241, 4583, 5039, 5153, 5381, 6521, 6863, 6977, 7433, 7547, 8117, 8231, 8573, 9029, 9257, 9371, 9941, 10169, 10739, 10853, 11423, 12107, 12791, 13931 (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) ~ 36n log n. - Charles R Greathouse IV, Jul 03 2016

MATHEMATICA

Select[Prime[Range[2400]], MemberQ[{23}, Mod[#, 57]] &] (* Vincenzo Librandi, Sep 02 2012 *)

PROG

(MAGMA) [p: p in PrimesUpTo(14000) | p mod 57 eq 23 ]; // Vincenzo Librandi, Sep 02 2012

(PARI) is(n)=isprime(n) && n%57==23 \\ Charles R Greathouse IV, Jul 03 2016

CROSSREFS

Cf. A000040.

Sequence in context: A191745 A260842 A093806 * A254758 A057883 A160221

Adjacent sequences:  A142676 A142677 A142678 * A142680 A142681 A142682

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 March 25 03:50 EDT 2019. Contains 321450 sequences. (Running on oeis4.)