I have set of data with some random numbers.
And I need to group them by their order of appearance
For example

I need to make above data into like below.

like first 7 rows should have recordID 1, next 3 row should have recordID 2 and so on.
I tried to group them but can't find right tools to do so because other datas have nothing in common for grouping.
Is there any tools or formula that I can use to prepare my data?