Expansion of exp( Sum_{n>=1} sigma(6*n)*x^n/n ) in powers of x.

Terms

a(0) =1a(1) =12a(2) =86a(3) =469a(4) =2141a(5) =8594a(6) =31247a(7) =104945a(8) =330094a(9) =982284a(10) =2786861a(11) =7584060a(12) =19893185a(13) =50494558a(14) =124437410a(15) =298555264a(16) =699017259a(17) =1600364304a(18) =3589048673a(19) =7896510620a(20) =17067607791a(21) =36283650153a(22) =75947406513a(23) =156672628539a(24) =318804641925a(25) =640390347979