cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

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

Original entry on oeis.org

1, 2, 3, 4, 6, 8, 9, 11, 12, 13, 22, 24, 26, 27, 33, 44, 45, 48, 66, 71, 76, 88, 107, 132, 148, 168, 176, 187, 207, 216, 264, 330, 360, 418, 440, 462, 528, 672, 864, 880, 1056, 1221, 1276, 1304, 1340, 1408, 1465, 1531, 1672, 1683, 2153, 2374, 2760, 3520
Offset: 1

Views

Author

Robert Price, Dec 04 2013

Keywords

Comments

a(211) > 3.0*10^13. - Bruce Garner, Jun 06 2021

Examples

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

Crossrefs

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

Programs

  • Mathematica
    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 *)
    Module[{nn=3600,sp},sp=Accumulate[Prime[Range[nn]]^10];Select[ Range[ nn],Divisible[ sp[[#]]+1,#]&]] (* Harvey P. Dale, Sep 18 2018 *)