Expansion of exp( Sum_{n>=1} -sigma(9*n)*x^n/n ) in powers of x.

Terms

a(0) =1a(1) =-13a(2) =65a(3) =-126a(4) =-117a(5) =988a(6) =-1377a(7) =-1157a(8) =5382a(9) =-4419a(10) =-4212a(11) =12519a(12) =-11179a(13) =-5058a(14) =27378a(15) =-23005a(16) =-16488a(17) =44343a(18) =-30249a(19) =-18513a(20) =73710a(21) =-56259a(22) =-38741a(23) =93483a(24) =-69570a(25) =-23778a(26) =137266a(27) =-90396a(28) =-74079a(29) =140292