How it works and examples
The sequence starts F(0)=0 and F(1)=1. Enter an unsigned integer index from 0 to 10000. Example: F(10)=55. Results are exact decimal integers, not floating-point approximations.
Calculate the exact Fibonacci number at index n.
Numbers StatelessThe sequence starts F(0)=0 and F(1)=1. Enter an unsigned integer index from 0 to 10000. Example: F(10)=55. Results are exact decimal integers, not floating-point approximations.