A Chebyshev transform of the odd numbers.

Terms

a(0) =1a(1) =3a(2) =3a(3) =-2a(4) =-9a(5) =-9a(6) =2a(7) =15a(8) =15a(9) =-2a(10) =-21a(11) =-21a(12) =2a(13) =27a(14) =27a(15) =-2a(16) =-33a(17) =-33a(18) =2a(19) =39a(20) =39a(21) =-2a(22) =-45a(23) =-45a(24) =2a(25) =51a(26) =51a(27) =-2a(28) =-57a(29) =-57