%I
%S 17,33,36,40,41,50,52,57,65,68,72,73,76,80,81,85,89,97,104,108,109,
%T 113,116,117,125,129,130,132,133,136,137,144,145,148,152,153,157,160,
%U 164,170,172,177,180,185,189,193,197,200,201,204,205,208,209,216,221
%N Numbers having a at least two representations as sum of two powerful numbers (A001694).
%C A085252(a(n))>1.
%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/PowerfulNumber.html">Powerful Number</a>
%Y Cf. A085254, A076871, A085253.
%K nonn
%O 1,1
%A _Reinhard Zumkeller_, Jun 23 2003
