a(n) = (2*n+1)*(2*n+2)*(2*n+4)*(2*n+5).

Terms

a(0) =40a(1) =504a(2) =2160a(3) =6160a(4) =14040a(5) =27720a(6) =49504a(7) =82080a(8) =128520a(9) =192280a(10) =277200a(11) =387504a(12) =527800a(13) =703080a(14) =918720a(15) =1180480a(16) =1494504a(17) =1867320a(18) =2305840a(19) =2817360a(20) =3409560a(21) =4090504a(22) =4868640a(23) =5752800a(24) =6752200a(25) =7876440a(26) =9135504a(27) =10539760a(28) =12099960a(29) =13827240