16-almost primes (generalization of semiprimes).

Terms

a(0) =65536a(1) =98304a(2) =147456a(3) =163840a(4) =221184a(5) =229376a(6) =245760a(7) =331776a(8) =344064a(9) =360448a(10) =368640a(11) =409600a(12) =425984a(13) =497664a(14) =516096a(15) =540672a(16) =552960a(17) =557056a(18) =573440a(19) =614400a(20) =622592a(21) =638976a(22) =746496a(23) =753664a(24) =774144a(25) =802816a(26) =811008a(27) =829440a(28) =835584a(29) =860160