%I

%S 2,16,130,192,448,1120,13468,23296,7176640,135939072,581150416,

%T 3259721920,9517877824,21538220800

%N Numbers n such that sigma(2n+1)=3n.

%K nonn

%O 1,1

%A _Benoit Cloitre_, Feb 04 2002

%E a(9)-a(14) from _Donovan Johnson_, Jan 31 2009