Triangle of coefficients in a Fibonacci-like sequence of polynomials.

Terms

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