# Even Fibonacci Sum

The Fibonacci series is a sequence of numbers in which each number is the sum of the two previous numbers, starting with 1 and 1.

Example: $$1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, ...$$

Assuming the values in the sequence don't exceed four million, what is the sum of the even terms?

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