OFFSET
0,2
LINKS
Amiram Eldar, Table of n, a(n) for n = 0..10000
MATHEMATICA
f[n_] := Sum[1 + Floor@ Log[2, 10^n/5^k], {k, 0, Floor@ Log[5, 10^n]}]; Array[f, 47, 0]
CROSSREFS
KEYWORD
base,nonn
AUTHOR
Robert G. Wilson v, Sep 27 2010
STATUS
approved