The Fibonacci sequence is defined by the recurrence relation:
, where and .
It turns out that , which contains digits, is the first Fibonacci number for which the last nine digits are - pandigital (contain all the digits to , but not necessarily in order). And , which contains digits, is the first Fibonacci number for which the first nine digits are - pandigital.
Given that is the first Fibonacci number for which the first nine digits AND the last nine digits are - pandigital, find .
Write-up coming later
The complete problem is available here. An approach, code, and answer will be added later.