A076569 - OEIS

%I #6 Aug 20 2014 15:15:57

%S 7,3,11,13,5,17,19,7,23,5,3,29,31,11,7,37,13,41,43,5,47,7,17,53,11,19,

%T 59,61,7,13,67,23,71,73,5,11,79,3,83,17,29,89,13,31,19,97,11,101,103,

%U 7,107,109,37,113,23,13,17,11,41,5,127,43,131,19,5,137,139,47,13,29,7

%N Greatest prime divisor of 6n+15 (sum of six successive integers).

%t Table[FactorInteger[6n+15][[-1,1]],{n,80}] (* _Harvey P. Dale_, Aug 20 2014 *)

%K easy,nonn

%O 1,1

%A _Zak Seidov_, Oct 19 2002