OFFSET
1,1
LINKS
Jason Yuen, Table of n, a(n) for n = 1..10000
EXAMPLE
729 = 1+3+3^6.
CROSSREFS
KEYWORD
nonn
AUTHOR
Reinhard Zumkeller, May 26 2003
EXTENSIONS
More terms from David Wasserman, Dec 29 2004
STATUS
approved