Math Is Fun Forum

Hello, forum.

I'm struggling to find a good calculator to count all possible permutations with repetition for about a month already.

I've found this calculator: Math Is Fun Calculator, and it can really help me, but i dont get fhow to use the "has", "pattern" and "no" rules.

For example: I need to find all permutations with repetition for combination of 5 numbers, including numbers (1,2,3), where number 1 is repeated 3 times. Combinations like (11123;21113;31211, etc...)

Can someone please help and explain how to use those rules in mathisfun calculator? Or is there any better calculator, that can help me with my problem?

Thank you in advance!