OFFSET
1,5
REFERENCES
Marc Deleglise and Joel Rivat, Computing the summation of the Mobius function, Experiment. Math. 5 (1996), no. 4, 291-295.
FORMULA
a(n) = A002321(n^n).
MATHEMATICA
Table[Sum[MoebiusMu[k], {k, n^n}], {n, 7}]
CROSSREFS
KEYWORD
sign,more
AUTHOR
Carl Najafi, Dec 04 2011
EXTENSIONS
a(9)-a(10) from Max Alekseyev, Dec 10 2011
a(11) from Donovan Johnson, Jun 21 2012
a(12)-a(13) from Rikard Nordgren, Nov 10 2012
STATUS
approved