a(0) = 6, a(1) = 17, a(n+1) = a(n) + a(n-1) for n>0.

Terms

a(0) =6a(1) =17a(2) =23a(3) =40a(4) =63a(5) =103a(6) =166a(7) =269a(8) =435a(9) =704a(10) =1139a(11) =1843a(12) =2982a(13) =4825a(14) =7807a(15) =12632a(16) =20439a(17) =33071a(18) =53510a(19) =86581a(20) =140091a(21) =226672a(22) =366763a(23) =593435a(24) =960198a(25) =1553633a(26) =2513831a(27) =4067464a(28) =6581295a(29) =10648759