1,1
A217425 consists of numbers of the form (5^r)*(7^s). This sequence holds the r values.
Table of n, a(n) for n=1..7.
Cf. A217425, A217427.
Sequence in context: A204594 A204157 A010219 * A056139 A106293 A046734
Adjacent sequences: A217423 A217424 A217425 * A217427 A217428 A217429
nonn,base,less
James G. Merickel, Oct 03 2012
approved