This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A035259 #8 Jul 30 2020 12:24:16 %S A035259 1,2,4,5,8,9,10,11,16,18,19,20,22,25,29,31,32,36,38,40,41,44,45,49,50, %T A035259 55,58,59,61,62,64,71,72,76,79,80,81,82,88,89,90,95,98,99,100,101,109, %U A035259 110,116,118,121,122,124,125,128,131,139,142,144,145,149,151 %N A035259 Indices of the nonzero terms in expansion of Dirichlet series Product_p (1-(Kronecker(m,p)+1)*p^(-s)+Kronecker(m,p)*p^(-2s))^(-1) for m= 20. %o A035259 (PARI) m=20; select(x -> x, direuler(p=2,101,1/(1-(kronecker(m,p)*(X-X^2))-X)), 1) %Y A035259 Cf. A035202 (the expansion itself). %K A035259 nonn %O A035259 1,2 %A A035259 _N. J. A. Sloane_ %E A035259 Edited and extended by _Andrey Zabolotskiy_, Jul 30 2020