This site is supported by donations to The OEIS Foundation. Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A239343 Numbers n such that n^5+5 is prime. 2
 0, 2, 36, 42, 56, 72, 98, 122, 134, 156, 162, 182, 212, 302, 338, 386, 486, 492, 576, 642, 666, 672, 698, 708, 722, 734, 782, 828, 846, 878, 882, 888, 896, 938, 962, 974, 986, 992, 1052, 1062, 1104, 1106, 1148, 1182, 1224, 1244, 1266, 1284, 1304, 1338, 1394 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Note that all numbers in this sequence are even. There is no sequence "Numbers n such that n^4+4 is prime" because of the factorization n^4 + 4 = (n^2 + 2n + 2)*(n^2 - 2n + 2). - Michael B. Porter, based on observation by Derek Orr, Mar 17 2014 LINKS Harvey P. Dale, Table of n, a(n) for n = 1..1000 EXAMPLE 2^5+5 = 37 is prime. Thus, 2 is a member of this sequence. 36^5+5 = 60466181 is prime. Thus, 36 is a member of this sequence. MATHEMATICA Select[Range[0, 1500], PrimeQ[#^5+5]&] (* Harvey P. Dale, Feb 03 2015 *) PROG (Python) import sympy from sympy import isprime {print(n) for n in range(10**4) if isprime(n**5+5)} (PARI) is(n)=isprime(n^5+5) \\ Charles R Greathouse IV, Jun 06 2017 CROSSREFS Cf. A067201, A049441. Sequence in context: A256060 A096513 A037418 * A058517 A081310 A187298 Adjacent sequences:  A239340 A239341 A239342 * A239344 A239345 A239346 KEYWORD easy,nonn AUTHOR Derek Orr, Mar 16 2014 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.

Last modified June 24 21:16 EDT 2019. Contains 324337 sequences. (Running on oeis4.)