a(n) = Product_{k=1..n}(k + prime(k)).

A093570

a(n) = Product_{k=1..n}(k + prime(k)).

Terms

    a(0) =3a(1) =15a(2) =120a(3) =1320a(4) =21120a(5) =401280a(6) =9630720a(7) =260029440a(8) =8320942080a(9) =324516741120

External references