a(n) = n! * (prime(n+1) + prime(n)) / (prime(n+1) - prime(n)).

A204676

a(n) = n! * (prime(n+1) + prime(n)) / (prime(n+1) - prime(n)).

Terms

    a(0) =5a(1) =8a(2) =36a(3) =108a(4) =1440a(5) =5400a(6) =90720a(7) =423360a(8) =3144960a(9) =108864000a(10) =452390400a(11) =9340531200a(12) =261534873600

External references