auto numbering rows that skip blanks and update accurately when inserting a copied row

I am trying to make a formula that automatically correctly numbers rows, but skips certain blank rows. I am often copying and inserting rows, and want the formula to be correct then as well. I am thinking some combination of countif and offset may work. I essentially want the number to count all the rows above itself to a fixed cell ( in this case, $A$5) and add one, without counting rows=0. Copying and pasting =OFFSET(A6,-1,0)+1 works, where A5=1, but resets to one after a blank row. =COUNTIF($A$5:A6,">0")+1 works for the blank/zero values but does not update correctly when I insert a copied row, and A5=1 and A6=2. Any ideas?

Unfortunately, I still run into the problem that when I copy a row and insert it, the row below it will not update automatically. I think I need some kind of formula that is self referential without breaking, which is why I was considering OFFSET.

Although that is true, lots of solutions work if I recopy the formulas all the time. I want something where that isn't necessary. I am constantly copying and inserting, and a few lines are blank so I would have to go through and delete these formulas.

I have a variety of formulas in each row that need be in any new row. Often many of the comments and values are similar as well so doing it this way saves time. The only formula that breaks using this method is the row counting formula, which is the least important. Inserting a row and using "paste special" and picking "formulas only" adds too many steps and would break the counting formula anyway.

That wouldn't solve the problem of inserting line items that are extremely similar, which save me a lot of steps. It still seems like something could be done with OFFSET or some other function that can be self referential in terms of position.