The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A035149 Coefficients in expansion of Dirichlet series Product_p (1-(Kronecker(m,p)+1)*p^(-s)+Kronecker(m,p)*p^(-2s))^(-1) for m = -41. 1

%I

%S 1,2,2,3,2,4,2,4,3,4,2,6,0,4,4,5,0,6,2,6,4,4,0,8,3,0,4,6,0,8,0,6,4,0,

%T 4,9,2,4,0,8,1,8,0,6,6,0,2,10,3,6,0,0,0,8,4,8,4,0,0,12,2,0,6,7,0,8,2,

%U 0,0,8,2,12,2,4,6,6,4,0,2,10

%N Coefficients in expansion of Dirichlet series Product_p (1-(Kronecker(m,p)+1)*p^(-s)+Kronecker(m,p)*p^(-2s))^(-1) for m = -41.

%H G. C. Greubel, <a href="/A035149/b035149.txt">Table of n, a(n) for n = 1..10000</a>

%t a[n_] := If[n < 0, 0, DivisorSum[n, KroneckerSymbol[-41, #] &]];

%t Table[a[n], {n, 1, 100}] (* _G. C. Greubel_, Apr 25 2018 *)

%o (PARI) m=-41; direuler(p=2,101,1/(1-(kronecker(m,p)*(X-X^2))-X))

%K nonn

%O 1,2

%A _N. J. A. Sloane_

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 November 26 21:07 EST 2021. Contains 349344 sequences. (Running on oeis4.)