A Chebyshev transform of 2^n.

Terms

a(0) =1a(1) =2a(2) =3a(3) =4a(4) =6a(5) =10a(6) =15a(7) =20a(8) =30a(9) =52a(10) =78a(11) =96a(12) =144a(13) =282a(14) =423a(15) =420a(16) =630a(17) =1660a(18) =2490a(19) =1304a(20) =1956a(21) =11332a(22) =16998a(23) =-3896a(24) =-5844a(25) =95240a(26) =142860a(27) =-157160a(28) =-235740a(29) =983610