a(n) = binomial(prime(n),n)/prime(n) where prime(n) = n-th prime.

A075872

a(n) = binomial(prime(n),n)/prime(n) where prime(n) = n-th prime.

Terms

    a(0) =1a(1) =1a(2) =2a(3) =5a(4) =42a(5) =132a(6) =1144a(7) =3978a(8) =35530a(9) =690690a(10) =2731365a(11) =50067108a(12) =429757960a(13) =1822766520a(14) =15991836267a(15) =280086337895

External references