a(n) is the n-th primorial divided by squarefree kernel of corresponding central binomial coefficient.

A056607

a(n) is the n-th primorial divided by squarefree kernel of corresponding central binomial coefficient.

Terms

    a(0) =2a(1) =3a(2) =10a(3) =35a(4) =231a(5) =3003a(6) =14586a(7) =138567a(8) =5311735a(9) =154040315a(10) =434113615a(11) =16062203755a(12) =354604036745

External references