Coefficients of factor polynomials U(n,x) associated with reciprocation.

Terms

a(0) =1a(1) =1a(2) =-1a(3) =1a(4) =1a(5) =-3a(6) =-1a(7) =1a(8) =1a(9) =1a(10) =-7a(11) =-4a(12) =13a(13) =4a(14) =-7a(15) =-1a(16) =1a(17) =1a(18) =1a(19) =-15a(20) =-11a(21) =83a(22) =45a(23) =-220a(24) =-88a(25) =303a(26) =88a(27) =-220a(28) =-45a(29) =83