Position of first occurrence of n in A121382.

Terms

a(0) =1a(1) =6a(2) =24a(3) =160a(4) =30a(5) =84a(6) =60a(7) =120a(8) =180a(9) =960a(10) =360a(11) =504a(12) =1008a(13) =210a(14) =1470a(15) =2550a(16) =1050a(17) =420a(18) =630a(19) =924a(20) =840a(21) =1260a(22) =1320a(23) =2184a(24) =2520a(25) =2640a(26) =3120a(27) =5712a(28) =6120a(29) =5040