A Chebyshev transform of the Pell numbers.

Terms

a(0) =0a(1) =1a(2) =2a(3) =2a(4) =4a(5) =9a(6) =16a(7) =29a(8) =56a(9) =106a(10) =198a(11) =373a(12) =704a(13) =1325a(14) =2494a(15) =4698a(16) =8848a(17) =16661a(18) =31376a(19) =59089a(20) =111276a(21) =209554a(22) =394634a(23) =743177a(24) =1399552a(25) =2635641a(26) =4963450a(27) =9347186a(28) =17602652a(29) =33149377