Primes of the form k!!! - 1 = A007661(k) - 1, k > 0.

A135726

Primes of the form k!!! - 1 = A007661(k) - 1, k > 0.

Terms

    a(0) =2a(1) =3a(2) =17a(3) =79a(4) =4188799a(5) =2504902399

External references