15-almost primes (generalization of semiprimes).

Terms

a(0) =32768a(1) =49152a(2) =73728a(3) =81920a(4) =110592a(5) =114688a(6) =122880a(7) =165888a(8) =172032a(9) =180224a(10) =184320a(11) =204800a(12) =212992a(13) =248832a(14) =258048a(15) =270336a(16) =276480a(17) =278528a(18) =286720a(19) =307200a(20) =311296a(21) =319488a(22) =373248a(23) =376832a(24) =387072a(25) =401408a(26) =405504a(27) =414720a(28) =417792a(29) =430080