Fibonacci 15-step numbers, a(n) = a(n-1) + a(n-2) + ... + a(n-15).

Terms

a(0) =1a(1) =1a(2) =2a(3) =4a(4) =8a(5) =16a(6) =32a(7) =64a(8) =128a(9) =256a(10) =512a(11) =1024a(12) =2048a(13) =4096a(14) =8192a(15) =16384a(16) =32767a(17) =65533a(18) =131064a(19) =262124a(20) =524240a(21) =1048464a(22) =2096896a(23) =4193728a(24) =8387328a(25) =16774400a(26) =33548288a(27) =67095552a(28) =134189056a(29) =268374016