Sum of numerator and denominator in n-th harmonic number, 1 + 1/2 + 1/3 +...+ 1/n.

Terms

a(0) =2a(1) =5a(2) =17a(3) =37a(4) =197a(5) =69a(6) =503a(7) =1041a(8) =9649a(9) =9901a(10) =111431a(11) =113741a(12) =1506353a(13) =1532093a(14) =1556117a(15) =3157279a(16) =54394463a(17) =18358381a(18) =352893319a(19) =71354639a(20) =24031221a(21) =24266365a(22) =563299563a(23) =1704771547a(24) =42976237267a(25) =43319457067a(26) =392849685203a(27) =395718022103