a(n) = 5*F(n)^2 + 5*F(n) + 1, where F(n) = Fibonacci(n).

Terms

a(0) =1a(1) =11a(2) =11a(3) =31a(4) =61a(5) =151a(6) =361a(7) =911a(8) =2311a(9) =5951a(10) =15401a(11) =40051a(12) =104401a(13) =272611a(14) =712531a(15) =1863551a(16) =4875781a(17) =12760031a(18) =33398201a(19) =87424711a(20) =228859951a(21) =599129311a(22) =1568486161a(23) =4106261531a(24) =10750188961a(25) =28144128251a(26) =73681909211a(27) =192901135711