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

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A131278 Numbers m such that m divides the sum of the 18th powers of the first m primes. 2

%I #28 Oct 03 2023 20:03:51

%S 1,37,265,17207,9382589,970248431,2427811793,156281194823,

%T 2955922292131,372012276565795

%N Numbers m such that m divides the sum of the 18th powers of the first m primes.

%C a(10) > 3.0*10^12. - _Bruce Garner_, Mar 17 2021

%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]^18; If[ Mod[s, n] == 0, Print[n]], {n, 10^6}]

%t With[{nn = 18000}, Transpose[With[{c = Thread[{Range[nn], Accumulate[Prime[ Range[nn]]^18]}]}, Select[c, Divisible[Last[#], First[#]] &]]][[1]]] (* _Harvey P. Dale_, Dec 19 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 more,nonn

%O 1,2

%A _Alexander Adamchuk_, Jun 25 2007

%E a(5)-a(7) from _Robert Price_, Dec 13 2013

%E a(8) from _Paul W. Dyson_, Jan 08 2021

%E a(9) from _Bruce Garner_, Mar 17 2021

%E a(10) from _Paul W. Dyson_, Oct 03 2023

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified August 19 19:31 EDT 2024. Contains 375310 sequences. (Running on oeis4.)