Correlative number starting with predefined value

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Hi

I wanted to know if there is a way to include a column in a report that could show a correlative number, starting with "40" (for example, agent don't define it, it is defined from the start).

I reviewed the "Variable" documentation, but I only found an "Ad Hoc Value" type, I want it to be correlative. Is it possible? (example attached).

 

Thanks in advice
David