OFFSET
1,2
LINKS
Harry J. Smith, Table of n, a(n) for n = 1..200
FORMULA
MATHEMATICA
Array[Binomial[DivisorSigma[1, #], EulerPhi@ #] &, 31] (* Michael De Vlieger, Nov 03 2017 *)
PROG
(PARI) { for (n=1, 200, write("b064366.txt", n, " ", binomial(sigma(n), eulerphi(n))) ) } \\ Harry J. Smith, Sep 12 2009
CROSSREFS
KEYWORD
nonn
AUTHOR
Labos Elemer, Sep 27 2001
STATUS
approved