OFFSET
1,2
COMMENTS
a(47) > 1.4*10^13. - Bruce Garner, May 05 2021
LINKS
Bruce Garner, Table of n, a(n) for n = 1..46
EXAMPLE
a(5) = 10 because 1 plus the sum of the first 10 primes^13 is 10816960132320284800 which is divisible by 10.
MATHEMATICA
p = 2; k = 0; s = 1; lst = {}; While[k < 40000000000, s = s + p^13; If[Mod[s, ++k] == 0, AppendTo[lst, k]; Print[{k, p}]]; p = NextPrime@ p] (* derived from A128169 *)
CROSSREFS
Cf. A085450 (smallest m > 1 such that m divides Sum_{k=1..m} prime(k)^n).
KEYWORD
nonn
AUTHOR
Robert Price, Dec 07 2013
STATUS
approved