a(n) = Product_{d|n} lcm(d, sigma(d)) where sigma(k) is the sum of divisors of k (A000203).

Terms

a(0) =1a(1) =6a(2) =12a(3) =168a(4) =30a(5) =864a(6) =56a(7) =20160a(8) =1404a(9) =16200a(10) =132a(11) =2032128a(12) =182a(13) =56448a(14) =43200a(15) =9999360a(16) =306a(17) =23654592a(18) =380a(19) =190512000a(20) =451584a(21) =313632a(22) =552a(23) =29262643200a(24) =23250a(25) =596232a(26) =1516320a(27) =88510464a(28) =870a(29) =100776960000