Sorry there is no direct way I can find to solve your question. But if do not mind, you can use some helper rows and formulas to solve it.
Firstly, insert some blank row and type this formula
=B8+IF($C$4="",0,1) below the original table, and drag fill handle over the cells you want to use. B8 is the cell you use to add 1, and C4 is the cell you enter value. See screenshot:
Потім введіть
= C4 to the cell you want to always equal to the cell you entered.
Hide the original table and show only the formula table.
Hope it can do you a favor.