Also how do you restrict the domain to be integers in wolfram alpha?
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closed as off topic by Noah Snyder, Thomas, TMM, rschwieb, EuYu Nov 13 '12 at 14:53
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No its not (and you probably can't).
In my experience, for any input longer than some 10-20 characters, wolfram alpha more or less gives up and just freely interprets a fraction of your input.
(Mathematica is a fine tool though, but the suitable methods are highly dependent on the problem at hand.)