OFFSET
1,2
COMMENTS
Row sums of A127510.
EXAMPLE
a(n) = -15 = (-1) * 15, since mu(5) = -1 and T(5) = 15.
MATHEMATICA
Table[MoebiusMu[n]*n*(n+1)/2, {n, 1 , 60}] (* Amiram Eldar, Feb 26 2020 *)
CROSSREFS
KEYWORD
sign,easy
AUTHOR
Gary W. Adamson, Jan 17 2007
EXTENSIONS
More terms from Amiram Eldar, Feb 26 2020
STATUS
approved