q-factorial numbers 5!_q.

Terms

a(0) =1a(1) =120a(2) =9765a(3) =251680a(4) =3043425a(5) =22661496a(6) =121226245a(7) =510902400a(8) =1799118945a(9) =5507702200a(10) =15072415941a(11) =37630041120a(12) =87029433985a(13) =188664603960a(14) =386925380325a(15) =756298318336