a(n) = a(n-1) + a(n-2), for n>=2, with a(0)=27, a(1)=2.

Terms

a(0) =27a(1) =2a(2) =29a(3) =31a(4) =60a(5) =91a(6) =151a(7) =242a(8) =393a(9) =635a(10) =1028a(11) =1663a(12) =2691a(13) =4354a(14) =7045a(15) =11399a(16) =18444a(17) =29843a(18) =48287a(19) =78130a(20) =126417a(21) =204547a(22) =330964a(23) =535511a(24) =866475a(25) =1401986a(26) =2268461a(27) =3670447a(28) =5938908a(29) =9609355