This site is supported by donations to The OEIS Foundation.

 Please make a donation to keep the OEIS running. We are now in our 55th year. In the past year we added 12000 new sequences and reached 8000 citations (which often say "discovered thanks to the OEIS"). We need to raise money to hire someone to manage submissions, which would reduce the load on our editors and speed up editing. Other ways to donate

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A239414 Numbers n such that n^6-6 is prime. 8
 5, 7, 17, 37, 113, 137, 157, 173, 175, 203, 223, 227, 295, 337, 395, 407, 475, 487, 503, 535, 605, 617, 707, 743, 797, 833, 857, 863, 865, 877, 905, 943, 947, 965, 973, 995, 1037, 1043, 1057, 1103, 1217, 1243, 1247, 1277, 1295, 1337, 1357, 1363, 1375, 1403 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Note that all the numbers in this sequence are odd. LINKS Harvey P. Dale, Table of n, a(n) for n = 1..1000 EXAMPLE 5^6-6 = 15619 is prime. Thus, 5 is a member of this sequence. MATHEMATICA Select[Range[3, 1501, 2], PrimeQ[#^6-6]&] (* Harvey P. Dale, Jul 24 2016 *) PROG (Python) import sympy from sympy import isprime {print(n) for n in range(10**4) if isprime(n**6-6)} (PARI) is(n)=isprime(n^6-6) \\ Charles R Greathouse IV, Feb 17 2017 CROSSREFS Cf. A028870, A109836, A153974. Sequence in context: A038968 A243400 A318568 * A163570 A113282 A323200 Adjacent sequences:  A239411 A239412 A239413 * A239415 A239416 A239417 KEYWORD nonn AUTHOR Derek Orr, Mar 17 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 December 14 01:27 EST 2019. Contains 329978 sequences. (Running on oeis4.)