A215441 - OEIS

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

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

Other ways to Give

A215441

Numbers k such that 3^k + k^3 + 1 is prime.

4

0, 1, 7, 39, 97, 115, 199, 1287, 1411, 2713, 4647, 84985

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,3

COMMENTS

a(13) > 2*10^5. - Robert Price, Mar 06 2014

LINKS

Table of n, a(n) for n=1..12.

MATHEMATICA

Select[Range[0, 5000], PrimeQ[3^# + #^3 + 1] & ]

PROG

(Magma) [n: n in [0..800] | IsPrime(3^n+n^3+1)];

(PARI) is(n)=isprime(3^n+n^3+1) \\ Charles R Greathouse IV, Mar 06 2014

CROSSREFS

Sequence in context: A158576 A304012 A329528 * A373539 A027482 A352310

Adjacent sequences: A215438 A215439 A215440 * A215442 A215443 A215444

KEYWORD

nonn

AUTHOR

Vincenzo Librandi, Sep 03 2012

EXTENSIONS

a(12) from Robert Price, Mar 06 2014

STATUS

approved