There is a column number: 1, 2, 5, 13 Starting from the second, three times of each number is exactly equal to the sum of the two numbers on its left and right sides, and find whether the number 2009 is odd or even

There is a column number: 1, 2, 5, 13 Starting from the second, three times of each number is exactly equal to the sum of the two numbers on its left and right sides, and find whether the number 2009 is odd or even

1,2,5； 13,34,89； 233,610,1597； 4181,10946,28657.
Odd odd odd odd odd odd odd odd odd odd odd odd odd odd odd odd odd odd odd odd odd odd odd odd odd odd odd odd odd odd odd odd odd odd odd odd odd odd odd odd odd odd odd odd odd odd odd odd odd odd odd odd odd odd odd odd odd odd odd odd odd odd odd
Starting from the first number, every group of three is the repetition of "odd, even, odd"
2009/3=669.2
That is, the number 2009 is the second in group 670, so it is even