The n-th lucky number which is the product of exactly n primes (with multiplicity).
A140286
The n-th lucky number which is the product of exactly n primes (with multiplicity).
Terms
- a(0) =3a(1) =15a(2) =99a(3) =495a(4) =2079a(5) =4455a(6) =36855a(7) =70875a(8) =280665a(9) =1393119a(10) =4179357a(11) =12931731a(12) =32417901a(13) =161026623a(14) =514966329a(15) =1490692005
External references
- oeis: A140286