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A233133 Numbers k such that k divides 1 + Sum_{j=1..k} prime(j)^10. 1

%I #26 Jun 06 2021 06:42:07

%S 1,2,3,4,6,8,9,11,12,13,22,24,26,27,33,44,45,48,66,71,76,88,107,132,

%T 148,168,176,187,207,216,264,330,360,418,440,462,528,672,864,880,1056,

%U 1221,1276,1304,1340,1408,1465,1531,1672,1683,2153,2374,2760,3520

%N Numbers k such that k divides 1 + Sum_{j=1..k} prime(j)^10.

%C a(211) > 3.0*10^13. - _Bruce Garner_, Jun 06 2021

%H Bruce Garner, <a href="/A233133/b233133.txt">Table of n, a(n) for n = 1..210</a> (first 174 terms from Robert Price)

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

%e a(5)=6 because 1 plus the sum of the first 6 primes^10 is 164088217398 which is divisible by 6.

%t p = 2; k = 0; s = 1; lst = {}; While[k < 41000000000, s = s + p^10; If[Mod[s, ++k] == 0, AppendTo[lst, k]; Print[{k, p}]]; p = NextPrime@ p] (* derived from A128169 *)

%t Module[{nn=3600,sp},sp=Accumulate[Prime[Range[nn]]^10];Select[ Range[ nn],Divisible[ sp[[#]]+1,#]&]] (* _Harvey P. Dale_, Sep 18 2018 *)

%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 _Robert Price_, Dec 04 2013

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Last modified April 19 21:09 EDT 2024. Contains 371798 sequences. (Running on oeis4.)