a(n) = n^3 * Product_{p|n, p prime} (1 + 1/p).

Terms

a(0) =1a(1) =12a(2) =36a(3) =96a(4) =150a(5) =432a(6) =392a(7) =768a(8) =972a(9) =1800a(10) =1452a(11) =3456a(12) =2366a(13) =4704a(14) =5400a(15) =6144a(16) =5202a(17) =11664a(18) =7220a(19) =14400a(20) =14112a(21) =17424a(22) =12696a(23) =27648a(24) =18750a(25) =28392a(26) =26244a(27) =37632a(28) =25230a(29) =64800