Given a positive integer n, find the number of C(n,r) which are odd, r takes values between 0 and n, inclusive.
If the answer is Odd(n), post the value of Odd(999888777666555444333222111000).
Eg: Odd(1)=2, Odd(2)=2, Odd(3)=4, Odd(4)=2.
Friday, January 5, 2007
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