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

Author

Randy L. Ekl and Zak Seidov, Oct 17 2002

Keywords

• nonn
• more

Comments

Numbers k such that A072004(k) = 0.

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

Examples

			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.
		

Crossrefs

Cf. A024450, A072004, A077023.

Programs

Mathematica

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