A Chebyshev transform of the first kind of the central binomial numbers.

Terms

a(0) =1a(1) =2a(2) =4a(3) =14a(4) =48a(5) =162a(6) =556a(7) =1934a(8) =6784a(9) =23954a(10) =85044a(11) =303294a(12) =1085712a(13) =3898962a(14) =14040156a(15) =50678814a(16) =183309312a(17) =664263714a(18) =2411050084a(19) =8764098158a(20) =31899231088a(21) =116244082178a(22) =424064770188