Much appreciated! Perhaps your idea could be combined with the "Do" command to get the loop sorted but still seems uncertain to me how I implement that each s gets its own column until all calcs are done.

Hi alltimetrader

There is no need to create an empty Table and fill it using Do or some other looping construct. One way to deal with your problem is to encapsulate the generation of sums for a specific value of s and steps in a function. Then call the function in a Table to generate the desired output.

I modified your notebook and added the proposed solution in the attached "test loop atco v2.nb". The changes are at the end. No existing code was modified.

Attachments:

test loop atco v2.nb