a(n) = Sum_{i=0..n} Fibonacci(5*i).

Terms

a(0) =0a(1) =5a(2) =60a(3) =670a(4) =7435a(5) =82460a(6) =914500a(7) =10141965a(8) =112476120a(9) =1247379290a(10) =13833648315a(11) =153417510760