Expansion of exp( Sum_{n>=1} sigma(8*n)*x^n/n ) in powers of x.

Terms

a(0) =1a(1) =15a(2) =128a(3) =815a(4) =4289a(5) =19663a(6) =81057a(7) =306799a(8) =1081986a(9) =3594142a(10) =11338690a(11) =34193246a(12) =99080387a(13) =277046893a(14) =750192227a(15) =1973050940a(16) =5053026949a(17) =12628736331a(18) =30859262181a(19) =73849589786a(20) =173333118663a(21) =399528823032a(22) =905418038792