Triangle: a(n,k) = A055135(n,k)/C(n,k).

Terms

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