One fourth of the sum of the squares of the first n Fibonacci numbers with index divisible by 3.
A156085
One fourth of the sum of the squares of the first n Fibonacci numbers with index divisible by 3.
Terms
- a(0) =0a(1) =1a(2) =17a(3) =306a(4) =5490a(5) =98515a(6) =1767779a(7) =31721508a(8) =569219364a(9) =10214227045a(10) =183286867445
External references
- oeis: A156085