OFFSET
1,2
COMMENTS
a(9*n) = a(81*n) for all n.
LINKS
Antti Karttunen, Table of n, a(n) for n = 1..6561
CROSSREFS
KEYWORD
nonn
AUTHOR
Antti Karttunen, Aug 01 2009
EXTENSIONS
Name corrected by Kevin Ryde, Aug 29 2020
STATUS
approved