Least common multiple of all (k+1)'s, where the k's are the positive divisors of n.

Terms

a(0) =2a(1) =6a(2) =4a(3) =30a(4) =6a(5) =84a(6) =8a(7) =90a(8) =20a(9) =66a(10) =12a(11) =5460a(12) =14a(13) =120a(14) =48a(15) =1530a(16) =18a(17) =7980a(18) =20a(19) =2310a(20) =88a(21) =276a(22) =24a(23) =81900a(24) =78a(25) =378a(26) =140a(27) =3480a(28) =30a(29) =114576