This site is supported by donations to The OEIS Foundation.

 Please make a donation to keep the OEIS running. We are now in our 55th year. In the past year we added 12000 new sequences and reached 8000 citations (which often say "discovered thanks to the OEIS"). We need to raise money to hire someone to manage submissions, which would reduce the load on our editors and speed up editing. Other ways to donate

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A307420 Dirichlet g.f.: zeta(2*s) * zeta(3*s) / zeta(s). 1
 1, -1, -1, 1, -1, 1, -1, 0, 1, 1, -1, -1, -1, 1, 1, 0, -1, -1, -1, -1, 1, 1, -1, 0, 1, 1, 0, -1, -1, -1, -1, 0, 1, 1, 1, 1, -1, 1, 1, 0, -1, -1, -1, -1, -1, 1, -1, 0, 1, -1, 1, -1, -1, 0, 1, 0, 1, 1, -1, 1, -1, 1, -1, 1, 1, -1, -1, -1, 1, -1, -1, 0, -1, 1, -1 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1 COMMENTS Dirichlet convolution of A008836 and A010057. Dirichlet convolution of A210826 and A010052. LINKS Vaclav Kotesovec, Table of n, a(n) for n = 1..10000 Eric Weisstein's World of Mathematics, Dirichlet Generating Function Wikipedia, Dirichlet series MATHEMATICA Table[DivisorSum[n, Boole[IntegerQ[#^(1/3)]] * LiouvilleLambda[n/#]&], {n, 1, 100}] Table[DivisorSum[n, Mod[DivisorSigma[0, #], 3, -1] * Boole[IntegerQ[Sqrt[n/#]]] &], {n, 1, 100}] CROSSREFS Cf. A010052, A010057, A008836, A210826. Sequence in context: A212793 A053864 A189021 * A129667 A071374 A071025 Adjacent sequences:  A307417 A307418 A307419 * A307421 A307422 A307423 KEYWORD sign,mult AUTHOR Vaclav Kotesovec, Apr 08 2019 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified December 10 15:09 EST 2019. Contains 329896 sequences. (Running on oeis4.)