OFFSET
1,2
EXAMPLE
a(4)=4 since A068809(4)=49 and so 4+9=13 and 1+3=4.
CROSSREFS
KEYWORD
more,nonn,base
AUTHOR
Francois Jooste (phukraut(AT)hotmail.com), Mar 15 2002
EXTENSIONS
a(43)-a(80) from Giovanni Resta, Jun 27 2018
STATUS
approved