Least number of the form semiprime - 1 which is the product of exactly n primes.

Terms

a(0) =3a(1) =9a(2) =8a(3) =24a(4) =32a(5) =64a(6) =128a(7) =864a(8) =1792a(9) =1536a(10) =2048a(11) =4096a(12) =8192a(13) =24576a(14) =73728a(15) =98304a(16) =131072a(17) =393216a(18) =524288a(19) =1048576a(20) =3145728a(21) =6291456a(22) =8388608a(23) =37748736a(24) =50331648a(25) =150994944a(26) =301989888a(27) =268435456a(28) =1207959552a(29) =1610612736