OFFSET
0,7
LINKS
Seiichi Manyama, Table of n, a(n) for n = 0..10000
PROG
(PARI) a(n) = #select(x->((x%2) == 1), digits(3^n)); \\ Michel Marcus, Nov 22 2019
CROSSREFS
KEYWORD
nonn,base,easy
AUTHOR
Asher Auel, May 05 2000
STATUS
approved