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A131272 Numbers k such that k divides Sum_{j=1..k} prime(j)^12. 2

%I #31 Jan 04 2024 18:52:34

%S 1,37,7187,3140407,4986959,5139161,751213639,163007938237,

%T 5134788477263,36197588005399,940901369608517

%N Numbers k such that k divides Sum_{j=1..k} prime(j)^12.

%C a(11) > 4*10^13. - _Bruce Garner_, Aug 30 2021

%C a(12) > 10^15. - _Paul W. Dyson_, Jan 04 2024

%H OEIS Wiki, <a href="https://oeis.org/wiki/Sums_of_primes_divisibility_sequences">Sums of powers of primes divisibility sequences</a>.

%t s = 0; Do[s = s + Prime[n]^12; If[ Mod[s, n] == 0, Print[n]], {n, 1000000}]

%o (PARI) s=0; n=0; forprime(p=2,1e9,s+=p^12; if(s%n++==0, print1(n", "))) \\ _Charles R Greathouse IV_, Apr 14 2011

%Y Cf. A085450 = smallest m > 1 such that m divides Sum_{k=1..m} prime(k)^n.

%Y Cf. A007504, A045345, A171399, A128165, A233523, A050247, A050248.

%Y Cf. A024450, A111441, A217599, A128166, A233862, A217600, A217601.

%K nonn

%O 1,2

%A _Alexander Adamchuk_, Jun 25 2007, Jun 28 2007

%E a(4)-a(6) from _Robert G. Wilson v_, Jun 30 2007

%E a(7)-a(8) from _Charles R Greathouse IV_, Apr 14 2011

%E a(9) from _Bruce Garner_, Mar 23 2021

%E a(10) from _Bruce Garner_, Aug 30 2021

%E a(11) from _Paul W. Dyson_, Jan 04 2024

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Last modified September 6 21:16 EDT 2024. Contains 375728 sequences. (Running on oeis4.)