a(n) = Product_{i=4..n} (prime(i) - 5).

Terms

a(0) =1a(1) =1a(2) =1a(3) =2a(4) =12a(5) =96a(6) =1152a(7) =16128a(8) =290304a(9) =6967296a(10) =181149696a(11) =5796790272a(12) =208684449792