OFFSET
1,2
COMMENTS
No more terms through 630000. - Ryan Propper, May 12 2006
EXAMPLE
16 is in the sequence because 16 = 2^4 and 2^16 + 2^16 + 2^16 + 2^16 = 262144
= 512^2.
CROSSREFS
KEYWORD
hard,nonn
AUTHOR
Jason Earls, Jun 20 2005
EXTENSIONS
Two more terms from Ryan Propper, May 12 2006
STATUS
approved