OFFSET
1,1
FORMULA
a(n) = A069554(7^n).
MATHEMATICA
See A071686.
CROSSREFS
KEYWORD
nonn,base,more
AUTHOR
Labos Elemer, Jun 10 2002
EXTENSIONS
a(8)-a(9) from Max Alekseyev, Jun 17 2011
a(10)-a(14) from Giovanni Resta, Oct 30 2019
STATUS
approved