Suppose I have a dataframe, df like this
col1 col2 col3
1 2 34
11 32 32
21 62 34
31 12 31
13 82 35
11 32 33
41 32 33
and I want to select 3 rows after first 2 rows, that is I want to select these rows
21 62 34
31 12 31
13 82 35
How can I do this?