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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A174259 Primes p such that (p^2+3*p-3) and (p^3+3*p^2-3) are also prime. 1
2, 5, 7, 41, 131, 311, 857, 1321, 1427, 1627, 1667, 1697, 1901, 2237, 2311, 2341, 2357, 2957, 3167, 3331, 3767, 3881, 4567, 4637, 5237, 5881, 5927, 7477, 9187, 11197, 11701, 12037, 12421, 12491, 13367, 13627, 14081, 14447, 16111, 16477, 18047 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 1..1000

MATHEMATICA

Select[Prime[Range[5000]], PrimeQ[#^2 + 3 # - 3] && PrimeQ[#^3 + 3 #^2 - 3]&] (* Vincenzo Librandi, Apr 10 2013 *)

PROG

(MAGMA) [p: p in PrimesUpTo(20000) |IsPrime(p^2+3*p-3)and IsPrime(p^3+3*p^2-3)];

CROSSREFS

Sequence in context: A042559 A197222 A062645 * A215213 A069356 A041653

Adjacent sequences:  A174256 A174257 A174258 * A174260 A174261 A174262

KEYWORD

nonn,easy

AUTHOR

Vincenzo Librandi, Mar 14 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 | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified October 21 06:18 EDT 2019. Contains 328292 sequences. (Running on oeis4.)