1,2

a(n) = -15 = (-1) * 15, since mu(5) = -1 and T(5) = 15.

Cf. A008683, A000217, A127510.

Sequence in context: A010618 A070297 A094674 this_sequence A009014 A009036 A021281

Adjacent sequences: A125284 A125285 A125286 this_sequence A125288 A125289 A125290

sign

Gary W. Adamson (qntmpktK(AT)yahoo.com), Jan 17 2007