Increment by 1 based on another row

[bleu]

I need help trying to fill down these rows based on another row that's filled with only 1s and Nulls:

Site	Desired Output
[Null]
1	1
[Null]	1
1	2
[Null]	2
[Null]	2
1	3
[Null]	3
[Null]	3
1	4
[Null]	4
[Null]	4
[Null]	4
[Null]	4
1	5
[Null]	5
[Null]	5
1	6
[Null]	6

[Qiu]

@bleu 
We can use a Multi-Row formula tool for this purpose as below.
The first one will be zero so we can will replace it with a Formula tool.

[binu_acs · Accepted solution]

@bleu One way of doing this with the multi-row formula tool

[bleu]

Thank you Qiu, Thank you binuacs!

They both worked.

Really appreciate it! 😁