A188586 - OEIS

%I #15 Mar 30 2012 18:52:59

%S 4,6,10,14,34,26,107,50,74,98,317,122,5443,386,290,242,1577,362,2837,

%T 482,1154,6146,3467,722,2594,11027,1802,1922,14177,1442,10397,1682,

%U 18434,358406,10370,2522,445541,288293,31187,3362,127577,5762,145603,30722,7202

%N a(n) is the smallest m for which A188550(m)=n, or a(n)=0 if no such m exists.

%C Question: For which primes p exist terms in the sequence of the form 2*p^2? The sequence of these primes starts with 5, 7, 11, 19, 31, 29, 41, ...

%Y Cf. A188550, A188579.

%K nonn

%O 1,1

%A _Vladimir Shevelev_, Apr 04 2011

%E More terms from _Alois P. Heinz_, Apr 04 2011