19-almost primes (generalization of semiprimes).

Terms

a(0) =524288a(1) =786432a(2) =1179648a(3) =1310720a(4) =1769472a(5) =1835008a(6) =1966080a(7) =2654208a(8) =2752512a(9) =2883584a(10) =2949120a(11) =3276800a(12) =3407872a(13) =3981312a(14) =4128768a(15) =4325376a(16) =4423680a(17) =4456448a(18) =4587520a(19) =4915200a(20) =4980736a(21) =5111808a(22) =5971968a(23) =6029312a(24) =6193152