a(n) = smallest k such that n is the n-th largest divisor of k.

Terms

a(0) =1a(1) =4a(2) =15a(3) =20a(4) =30a(5) =48a(6) =84a(7) =160a(8) =144a(9) =210a(10) =462a(11) =240a(12) =624a(13) =1134a(14) =480a(15) =864a(16) =1836a(17) =720a(18) =8740a(19) =840a(20) =1512a(21) =2376a(22) =4968a(23) =2400a(24) =3900a(25) =3120a(26) =4536a(27) =4032a(28) =15312a(29) =2520