1,1

Probably there are no more terms.

Probably 5 and 70 are the only cases when digit sum of 2^n is equal to n. - Tanya Khovanova, Jul 23 2006

Probably 1, 2, 5 and 70 are the only cases when digit sum of 2^n is divisible by n. - Zak Seidov, Jul 24 2006

Sequence in context: A070873 A140509 A136318 this_sequence A119124 A131634 A049049

Adjacent sequences: A117768 A117769 A117770 this_sequence A117772 A117773 A117774

nonn,base,fini

Joshua Zucker, Jul 24 2006