sample different numbers of random rows

I want to sample 1:n rows from a data-frame randomly, 100 times (i.e. to give 2000 random data-frames).

I'm able to do this for say 10 random rows using the sample_n function:

ran_df <- sample_n(df, 10, replace = TRUE)

But how do I do this for all possible number of rows from my data-frame i.e. 1 row, 2 rows, 3 rows ... 20 rows?

My dataframe looks like this:

     bird_sp plant_sp value
1  species_a  plant_a     1
2  species_a  plant_a     1
3  species_a  plant_a     1
4  species_a  plant_a     1
5  species_a  plant_a     1
6  species_a  plant_b     1
7  species_a  plant_b     1
8  species_a  plant_b     1
9  species_a  plant_b     1
10 species_a  plant_c     1
11 species_a  plant_d     1
12 species_a  plant_d     1
13 species_b  plant_d     1
14 species_b  plant_d     1
15 species_b  plant_b     1
16 species_b  plant_b     1
17 species_b  plant_b     1
18 species_b  plant_b     1
19 species_b  plant_c     1
20 species_b  plant_c     1