OFFSET
1,6
COMMENTS
This sequence and A087802 first differ at term 144: a(144)=3 and A087802(144)=2. This sequence and A064372 first differ at term 64: a(64)=1 and A064372(64)=2. The next difference doesn't appear until a(144)=3 and A064372(144)=2. - Rick L. Shepherd, Mar 07 2004
Differs from A001221 at n=1, 144, 180, 210, 216 etc. - R. J. Mathar, Sep 19 2008
REFERENCES
D. S. Mitrinovic et al., Handbook of Number Theory, Kluwer, p. 41.
LINKS
G. C. Greubel, Table of n, a(n) for n = 1..5000
MATHEMATICA
Table[Floor[DivisorSigma[0, n^2]/DivisorSigma[0, n]], {n, 1, 50}] (* G. C. Greubel, May 14 2017 *)
PROG
(PARI) A079553(n)=floor(numdiv(n^2)/numdiv(n))
CROSSREFS
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Jan 24 2003
STATUS
approved