OFFSET
1,2
COMMENTS
Are there members with digit sum other than 2^n?
EXAMPLE
a(4) = 14641 because 14641 is 11^4 and its digit sum is 16, which is 2^4.
CROSSREFS
KEYWORD
hard,nonn,base
AUTHOR
Amarnath Murthy, Apr 04 2002
EXTENSIONS
Corrected and extended by David Wasserman, Apr 23 2003
STATUS
approved