Product of primes indexed by the prime exponents of n!.

Terms

a(0) =1a(1) =1a(2) =2a(3) =4a(4) =10a(5) =20a(6) =42a(7) =84a(8) =204a(9) =476a(10) =798a(11) =1596a(12) =3828a(13) =7656a(14) =12276a(15) =24180a(16) =36660a(17) =73320a(18) =120840a(19) =241680a(20) =389424a(21) =785680a(22) =1294440a(23) =2588880a(24) =3848880a(25) =7147920a(26) =11264760a(27) =15926040a(28) =26057304a(29) =52114608