%I A138835
%S A138835 4,64,65536,1073741824,309485009821345068724781056,
%T A138835 85070591730234615865843651857942052864
%N A138835 Bisection of even superperfect numbers A061652.
%C A138835 Also, bisection of superperfect numbers A019279, if there are no odd 
               superperfect numbers.
%C A138835 Next terms have 183, 663 and more digits and are therefore not listed. 
               - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), May 22 2008
%Y A138835 Cf. A019279, A061652, A099057, A099058, A134721, A134722, A138834.
%Y A138835 Sequence in context: A146520 A030176 A033635 this_sequence A119601 A058438 
               A041119
%Y A138835 Adjacent sequences: A138832 A138833 A138834 this_sequence A138836 A138837 
               A138838
%K A138835 nonn
%O A138835 1,1
%A A138835 Omar E. Pol (info(AT)polprimos.com), Apr 06 2008