There is no formula for problems with indistinguishable objects and indistinguishable boxes so the best is to list the solutions
Three boxes: 5 4 3 3 2 0 1 1 2 2 0 0 1 0 1
Answer: 5
--Eraymond 23:40, 28 September 2008 (UTC)
Writing it out this way is a good way to approach the solution since there is no formula for the problem, as you pointed out.
--Jniederh 18:53, 5 October 2008 (UTC)