data some_numbers; n=0; a=0; b=0; do while(n<1000); a= (here is my problem, I want a to be Sum(i in 1 to n-2) (* Floor (n/)) output; n=n+1; end; run; my over all aim is just to have two columns, one with just n=0 to 1000 or so, and the second column is (a) as above. however my above code wouldn't accept this difficult for (a).
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