Stirling transform of {1, primes}.

Terms

a(0) =1a(1) =3a(2) =10a(3) =38a(4) =163a(5) =774a(6) =4004a(7) =22315a(8) =132836a(9) =838378a(10) =5574797a(11) =38861142a(12) =282951538a(13) =2146361911a(14) =16931303262a(15) =138694760316