Create nCr with a single field

[aguzmanf]

I have a list of 20 unique numbers and I want to create an output of nCr rows
i.e. 20C5 = 15504 rows

Each row should have a unique combination of 5 of the numbers 

i.e.  in the table below row#2 is a duplicate from row#XX because they contain the same elements

ROW #	ID1	ID2	ID3	ID4	IDr
1	1	2	3	4	5
2	1	2	3	4	6
...	...	...	...	...	...
XX	2	1	3	4	6

I have tried with several macros and I can get to remove the duplicate pairs for the 1st iteration where there are only 2 fields but I still dont know how to remove duplication where there are more than 2 fields to search 

[Qiu · Accepted solution]

@aguzmanf 
I feel there should be a smarter way. but the result is correct.
I have also tested for 19C5 and get the correct answer 11628.