|
| |
|
|
A216618
|
|
Numbers k such that 10^k + k^10 + 1 is prime.
|
|
1
|
| |
|
|
|
OFFSET
|
1,2
|
|
|
COMMENTS
|
a(5) > 10^5. - Robert Price, Oct 06 2015
|
|
|
LINKS
|
Table of n, a(n) for n=1..4.
|
|
|
MATHEMATICA
|
Select[Range[0, 5000], PrimeQ[10^# + #^10 + 1] &]
|
|
|
PROG
|
(PARI) is(n)=ispseudoprime(10^n+n^10+1) \\ Charles R Greathouse IV, Jun 13 2017
|
|
|
CROSSREFS
|
Cf. A100357, A215434-A215446, A216375.
Sequence in context: A023680 A002769 A252617 * A185527 A306450 A259237
Adjacent sequences: A216615 A216616 A216617 * A216619 A216620 A216621
|
|
|
KEYWORD
|
nonn,hard,more
|
|
|
AUTHOR
|
Vincenzo Librandi, Sep 11 2012
|
|
|
STATUS
|
approved
|
| |
|
|
