A generalized Chebyshev transform of the Motzkin numbers A001006.

Terms

a(0) =1a(1) =1a(2) =-1a(3) =-2a(4) =0a(5) =0a(6) =-3a(7) =1a(8) =8a(9) =1a(10) =1a(11) =26a(12) =7a(13) =-51a(14) =-3a(15) =0a(16) =-264a(17) =-186a(18) =348a(19) =-120a(20) =-285a(21) =2697a(22) =2871a(23) =-2304a(24) =3393a(25) =8029a(26) =-25795a(27) =-36872a(28) =16108a(29) =-60010