OFFSET
1,2
COMMENTS
Submitted on the request of Omar E. Pol 17 July 2016. (A089579).
LINKS
Robert G. Wilson v, Table of n, a(n) for n = 1..100
FORMULA
Limit_{n->oo} a(n+1)/a(n) = 1.778279... (A011007). - Altug Alkan, Aug 22 2016
EXAMPLE
MATHEMATICA
f[n_] := Block[{lim = 10^n -1}, Sum[ (Floor[ lim^(1/k)] - 1)(1 + MoebiusMu[k]), {k, 2, Floor[ Log[2, lim]]}]]; Array[f, 36]
CROSSREFS
KEYWORD
nonn
AUTHOR
Robert G. Wilson v, Jul 24 2016
STATUS
approved