a(n) = the product of divisors of sum of divisors of n.

Terms

a(0) =1a(1) =3a(2) =8a(3) =7a(4) =36a(5) =1728a(6) =64a(7) =225a(8) =13a(9) =5832a(10) =1728a(11) =21952a(12) =196a(13) =331776a(14) =331776a(15) =31a(16) =5832a(17) =1521a(18) =8000a(19) =3111696a(20) =32768a(21) =10077696a(22) =331776a(23) =46656000000a(24) =31a(25) =3111696a(26) =2560000a(27) =9834496a(28) =810000a(29) =139314069504