Fibonacci 11-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) =1a(11) =1a(12) =2a(13) =4a(14) =8a(15) =16a(16) =32a(17) =64a(18) =128a(19) =256a(20) =512a(21) =1024a(22) =2047a(23) =4093a(24) =8184a(25) =16364a(26) =32720a(27) =65424a(28) =130816a(29) =261568