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Originally Posted by froseph
The reason i write explicit in quotes is because it would use floating point numbers which would give you rounding and thus would not give you the right answer (hmm maybe if you just rounded to an int it probably would work)
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Well, if you check out
MathWorld,
you can find some explicit formulas that are derived using the NINT and FLOOR functions. There's also one using the determinant of a matrix of 0 and 1 entries which could be useful, and a few explicit finite sums.