OFFSET
1,1
COMMENTS
A076078(n) equals the number of sets of distinct positive integers with a least common multiple of n.
LINKS
Charlie Neder, Table of n, a(n) for n = 1..1205
MATHEMATICA
f[n_] := Block[{d = Divisors[n]}, Plus @@ (MoebiusMu[n/d](2^DivisorSigma[0, d] - 1))]; t = Union[ Table[ f[n], {n, 2^20}]]; Complement[ Take[t, 52], Table[2^i, {i, 0, 20}]]
CROSSREFS
KEYWORD
nonn
AUTHOR
Robert G. Wilson v, Aug 17 2004
STATUS
approved