Number of powerful numbers k that are not powers of primes (i.e., k is in A286708) that do not exceed the primorial number A002110(n).

A380430

Number of powerful numbers k that are not powers of primes (i.e., k is in A286708) that do not exceed the primorial number A002110(n).

Terms

    a(0) =0a(1) =0a(2) =0a(3) =0a(4) =7a(5) =50a(6) =254a(7) =1245a(8) =5898a(9) =29600a(10) =163705a(11) =925977a(12) =5690175a(13) =36681963a(14) =241663896a(15) =1662446097a(16) =12134853382a(17) =93406989325a(18) =730785520398

External references