A characteristic triangle for the Fibonacci numbers.

Terms

a(0) =1a(1) =-1a(2) =1a(3) =1a(4) =-3a(5) =1a(6) =0a(7) =3a(8) =-8a(9) =1a(10) =0a(11) =0a(12) =9a(13) =-21a(14) =1a(15) =0a(16) =0a(17) =0a(18) =24a(19) =-55a(20) =1a(21) =0a(22) =0a(23) =0a(24) =0a(25) =64a(26) =-144a(27) =1a(28) =0a(29) =0