Number triangle associated to Chebyshev polynomials of the second kind.

Terms

a(0) =1a(1) =0a(2) =1a(3) =-1a(4) =2a(5) =1a(6) =0a(7) =3a(8) =4a(9) =1a(10) =1a(11) =4a(12) =15a(13) =6a(14) =1a(15) =0a(16) =5a(17) =56a(18) =35a(19) =8a(20) =1a(21) =-1a(22) =6a(23) =209a(24) =204a(25) =63a(26) =10a(27) =1a(28) =0a(29) =7