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

 

Logo

Many excellent designs for a new banner were submitted. We will use the best of them in rotation.

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A030431 Primes of form 10n+3. 19
3, 13, 23, 43, 53, 73, 83, 103, 113, 163, 173, 193, 223, 233, 263, 283, 293, 313, 353, 373, 383, 433, 443, 463, 503, 523, 563, 593, 613, 643, 653, 673, 683, 733, 743, 773, 823, 853, 863, 883, 953, 983, 1013, 1033, 1063, 1093, 1103, 1123, 1153, 1163, 1193 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Also primes of form 5n+3.

Primes p such that arithmetic mean of divisors of p^4 is an integer. There are 2 such sequences of primes, this one and A030430. [From Ctibor O. Zizka, Oct 20 2009]

LINKS

Michael B. Porter, Table of n, a(n) for n=0..100000

A. Granville and G. Martin, Prime number races

FORMULA

a(n) = 10*A102338(n) + 3.

Union of A132233, A132235, {3}. [From Ray Chandler, Apr 07 2009]

MATHEMATICA

Select[Prime@Range[200], Mod[ #, 10] == 3 &] (*Chandler*)

Select[10Range[0, 150]+3, PrimeQ]  (* Harvey P. Dale, Apr 06 2011 *)

CROSSREFS

Cf. A045414, A049508, A102338.

Sequence in context: A121756 A178825 A147473 * A090146 A133313 A230026

Adjacent sequences:  A030428 A030429 A030430 * A030432 A030433 A030434

KEYWORD

nonn

AUTHOR

Warut Roonguthai

EXTENSIONS

Extended by Ray Chandler, Nov 07 2006

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Transforms | Superseeker | Recent | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement .

Last modified April 24 12:03 EDT 2014. Contains 240983 sequences.