Triangle of coefficients of Chebyshev polynomials U_n(x).

Terms

a(0) =1a(1) =2a(2) =-1a(3) =4a(4) =-4a(5) =8a(6) =1a(7) =-12a(8) =16a(9) =6a(10) =-32a(11) =32a(12) =-1a(13) =24a(14) =-80a(15) =64a(16) =-8a(17) =80a(18) =-192a(19) =128a(20) =1a(21) =-40a(22) =240a(23) =-448a(24) =256a(25) =10a(26) =-160a(27) =672a(28) =-1024a(29) =512