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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A142062 Primes congruent to 23 mod 33. 2
23, 89, 353, 419, 617, 683, 881, 947, 1013, 1277, 1409, 1607, 1871, 2003, 2069, 2267, 2333, 2399, 2531, 2663, 2729, 2861, 2927, 3191, 3257, 3323, 3389, 3719, 3851, 3917, 4049, 4643, 4973, 5039, 5171, 5237, 5303, 5501, 5897, 6029, 6359, 6491, 6689, 7019 (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) ~ 20n log n. - Charles R Greathouse IV, Jul 02 2016

MATHEMATICA

Select[Range[23, 20000, 33], PrimeQ] (* Vladimir Joseph Stephan Orlovsky, Jun 24 2011 *)

Select[Prime[Range[3000]], MemberQ[{23}, Mod[#, 33]]&] (* Vincenzo Librandi, Aug 18 2012 *)

PROG

(MAGMA) [p: p in PrimesUpTo(8000) | p mod 33 eq 23 ]; // Vincenzo Librandi, Aug 18 2012

(PARI) is(n)=isprime(n) && n%33==23 \\ Charles R Greathouse IV, Jul 02 2016

CROSSREFS

Cf. A000040.

Sequence in context: A244453 A158537 A117049 * A050529 A215613 A306138

Adjacent sequences:  A142059 A142060 A142061 * A142063 A142064 A142065

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 October 21 14:11 EDT 2019. Contains 328301 sequences. (Running on oeis4.)