E.g.f.: 1 / (1 - Sum_{k>=1} x^prime(k) / prime(k)!).

Terms

a(0) =1a(1) =0a(2) =1a(3) =1a(4) =6a(5) =21a(6) =110a(7) =673a(8) =4312a(9) =34260a(10) =280212a(11) =2648581a(12) =26580840a(13) =292468333a(14) =3453838544a(15) =43672689816a(16) =590203920256