Numerator of f(n) := Product_{i=1..n} sigma(i)/i.

Terms

a(0) =1a(1) =3a(2) =2a(3) =7a(4) =21a(5) =42a(6) =48a(7) =18a(8) =26a(9) =234a(10) =2808a(11) =6552a(12) =7056a(13) =12096a(14) =96768a(15) =187488a(16) =3374784a(17) =7312032a(18) =29248128a(19) =307105344a(20) =467970048a(21) =8423460864a(22) =202163060736a(23) =101081530368