q-factorial numbers 4!_q.

Terms

a(0) =1a(1) =24a(2) =315a(3) =2080a(4) =8925a(5) =29016a(6) =77959a(7) =182400a(8) =384345a(9) =746200a(10) =1356531a(11) =2336544a(12) =3847285a(13) =6097560a(14) =9352575a(15) =13943296a(16) =20276529a(17) =28845720a(18) =40242475a(19) =55168800a(20) =74450061a(21) =99048664a(22) =130078455a(23) =168819840a(24) =216735625a(25) =275487576a(26) =346953699a(27) =433246240a(28) =536730405a(29) =660043800