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Re: Iterator problem.


Robert G. Wilson v wrote:
> Hello,
> 
> 	I am having a problem with iterators in Mathematica.
> 	
> 	I have a sequence of integers defined by a[n]. I wish to build a table
> of integers out of the above such that this table only contains integers of
> the form a(i)+a(j)+a(k).
> 
> 	I tried Table[a[i] + a[j] + a[k], {k, 1, 3}, {j, i, k}, {i, 1, j}] but
> the iterators do not have appropriate bounds.
> 
> 	Any help would be greatly appreciated.
> 
> Sincerely,
> 
> Bob.
> 
Your middle iterator depends on i, which is your innermost iterator - 
hence the error. Try

Table[a[i] + a[j] + a[k], {k, 1, 3}, {j, i, k}, {i, 1, j}] //Flatten

David Bailey


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