A077022 Values of k such that sum of first k primes squared is divisible by k-th prime.

1, 6, 17, 11156, 16548

Offset

1,2

Comments

Numbers k such that A072004(k) = 0.

a(6) > 10^11. - Giovanni Resta, Mar 07 2013

Links

Table of n, a(n) for n=1..5.

Example

6 is a term because A024450(6)/prime(6) = 29;
17 is a term because A024450(17)/prime(17) = 284;
11156 is a term because A024450(11156)/prime(11156) = 410066261;
16548 is a term because A024450(16548)/prime(16548) = 941945317.

Mathematica

Module[{nn=17000, prs}, prs=Accumulate[Prime[Range[nn]]^2]; Select[Range[ nn], Divisible[prs[[#]], Prime[#]]&]] (* Harvey P. Dale, Nov 23 2013 *)

Crossrefs

Cf. A024450, A072004, A077023.

Sequence in context: A209341 A376134 A355787 * A074923 A093061 A264028

Adjacent sequences: A077019 A077020 A077021 * A077023 A077024 A077025

Keyword

nonn,more

Author

Randy L. Ekl and Zak Seidov, Oct 17 2002

Status

approved