The OEIS is supported by the many generous donors to the OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A073102 Primes of the form 210n + 1. 21
 211, 421, 631, 1051, 1471, 2311, 2521, 2731, 3361, 3571, 4201, 4621, 4831, 5881, 6091, 6301, 7351, 7561, 8191, 8821, 9241, 9661, 9871, 10501, 10711, 11131, 11551, 11971, 12391, 12601, 13441, 14071, 14281, 15121, 15331, 15541, 16381, 17011 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS EXAMPLE 211 = 210*1 + 1 is prime; 1471 = 210*7 + 1 is prime. MATHEMATICA 210*Flatten[Position[PrimeQ[210Range[100]+1], True]]+1 Select[1+210Range[100], PrimeQ] (* Ray Chandler, Apr 29 2010 *) PROG (Magma) [ a: n in [0..400] | IsPrime(a) where a is 210*n+1] // Vincenzo Librandi, Aug 08 2010 (PARI) select(x->((x % 210)==1), primes(3000)) \\ Michel Marcus, Jan 14 2018 CROSSREFS Subsequence of A142076, A124826, and A132230. Cf. A073085. Sequence in context: A147156 A140535 A258332 * A076167 A217620 A289993 Adjacent sequences: A073099 A073100 A073101 * A073103 A073104 A073105 KEYWORD easy,nonn AUTHOR Zak Seidov Aug 24 2002 EXTENSIONS Extended by Ray Chandler, Apr 29 2010 STATUS approved

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

Last modified March 27 12:46 EDT 2023. Contains 361570 sequences. (Running on oeis4.)