Denominators of coefficients for numerical differentiation.

Terms

a(0) =1a(1) =1a(2) =12a(3) =6a(4) =180a(5) =10a(6) =560a(7) =1260a(8) =12600a(9) =1260a(10) =166320a(11) =13860a(12) =2522520a(13) =2702700a(14) =2882880a(15) =360360a(16) =110270160a(17) =2042040a(18) =775975200a(19) =162954792a(20) =56904848a(21) =2586584a(22) =1427794368a(23) =892371480a(24) =116008292400a(25) =120470149800