Denominators of coefficients in expansion of x/(exp(x)-1).

Terms

a(0) =1a(1) =2a(2) =12a(3) =1a(4) =720a(5) =1a(6) =30240a(7) =1a(8) =1209600a(9) =1a(10) =47900160a(11) =1a(13) =1a(14) =74724249600a(15) =1a(17) =1a(19) =1a(21) =1a(23) =1a(25) =1a(27) =1a(29) =1a(31) =1