a(n) = Sum_{k=0..n} 4^k*F(k) where F(k) is the k-th Fibonacci number.
A082988
a(n) = Sum_{k=0..n} 4^k*F(k) where F(k) is the k-th Fibonacci number.
Terms
- a(0) =0a(1) =4a(2) =20a(3) =148a(4) =916a(5) =6036a(6) =38804a(7) =251796a(8) =1628052a(9) =10540948a(10) =68212628a(11) =441505684a(12) =2857424788a(13) =18493790100a(14) =119693957012a(15) =774676469652
External references
- oeis: A082988