I saw this:

binomial(n+3, n) mod n = 1

How can I solve for a few of the values of n...

I have a basic understanding of mod such that if something were written: (242%9) I would know the answer to be 8... But what is this binomial form.. I've never seen this notation? Can someone give me an example of working this problem: binomial(n+3, n) mod n = 1

For say the first 3 numbers that work in this equation as "n"