Fibonacci sequence beginning 1, 5.

Terms

a(0) =1a(1) =5a(2) =6a(3) =11a(4) =17a(5) =28a(6) =45a(7) =73a(8) =118a(9) =191a(10) =309a(11) =500a(12) =809a(13) =1309a(14) =2118a(15) =3427a(16) =5545a(17) =8972a(18) =14517a(19) =23489a(20) =38006a(21) =61495a(22) =99501a(23) =160996a(24) =260497a(25) =421493a(26) =681990a(27) =1103483a(28) =1785473a(29) =2888956