Denominators of expansion of Debye function for n=4: D(4,x).

Terms

a(0) =1a(1) =5a(2) =18a(3) =1a(4) =1440a(5) =1a(6) =75600a(7) =1a(8) =3628800a(9) =1a(10) =167650560a(11) =1a(13) =1a(14) =336259123200a(15) =1a(17) =1a(19) =1a(21) =1a(23) =1a(25) =1a(27) =1