Add Row Preserving Formulas And Formats From The Above Row

I have a table with 15 columns and 10 rows (initially all cells are blank but with formulas and formatted) and I want a way to add automatically a new row in my table each time something is entered on first cell in each row. For example if I enter something in cell A1 (first cell in my table) then automatically add 11th row and if I delete the value in cell A1 it is ok to leave the 11th row there but if I I go on and enter a vlaue in A2 then add row 12th. Of course I want the new rows to have the same formats and formulas as the previous ones.