Fibonacci 12-step numbers.

Terms

a(0) =0a(1) =0a(2) =0a(3) =0a(4) =0a(5) =0a(6) =0a(7) =0a(8) =0a(9) =0a(10) =0a(11) =1a(12) =1a(13) =2a(14) =4a(15) =8a(16) =16a(17) =32a(18) =64a(19) =128a(20) =256a(21) =512a(22) =1024a(23) =2048a(24) =4095a(25) =8189a(26) =16376a(27) =32748a(28) =65488a(29) =130960