A125287 a(n) = mu(n) * A000217(n).

1, -3, -6, 0, -15, 21, -28, 0, 0, 55, -66, 0, -91, 105, 120, 0, -153, 0, -190, 0, 231, 253, -276, 0, 0, 351, 0, 0, -435, -465, -496, 0, 561, 595, 630, 0, -703, 741, 780, 0, -861, -903, -946, 0, 0, 1081, -1128, 0, 0, 0, 1326, 0, -1431, 0, 1540, 0, 1653, 1711, -1770

Offset

1,2

Comments

Row sums of A127510.

Links

Table of n, a(n) for n=1..59.

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

Cf. A008683, A000217, A127510.

Sequence in context: A284896 A299032 A094674 * A264813 A009014 A009036

Adjacent sequences: A125284 A125285 A125286 * A125288 A125289 A125290

Keyword

sign,easy

Author

Gary W. Adamson, Jan 17 2007

Extensions

More terms from Amiram Eldar, Feb 26 2020

Status

approved