Prime shadows of colossally abundant numbers, A004490.

Terms

a(0) =2a(1) =4a(2) =6a(3) =12a(4) =20a(5) =30a(6) =60a(7) =84a(8) =168a(9) =336a(10) =528a(11) =880a(12) =1320a(13) =2640a(14) =5280a(15) =10560a(16) =12480a(17) =24960a(18) =49920a(19) =74880a(20) =104832a(21) =209664a(22) =419328a(23) =838656a(24) =1096704a(25) =2193408a(26) =4386816a(27) =8773632a(28) =14622720a(29) =29245440