simple simulation

hi
i've one issue here and i suppose some simulation here.
the task is that:

we have some formula that sums the 2 numbers. we need to put numbers (from 1 to 100, by 1 item like n+1) by order get result and put number 2 to one column and answer to the other and so on, 100 times for n+1.

for example,i put 1 ,get answer as 3. i put 1 to the Number 2 column and answer 3 to Answer column , and go next put 2 ,get answer 4 ,put number 2 to the Number 2 column and answer 4 to the Answer column.

how can i do this?

please see attachment.