🧮 combination with replacement
n multichoose k = C(n + k – 1, k)
- ① Formula: C((n + k – 1), k) = (n + k – 1)! / (k! · (n – 1)!)
- ② Awaiting inputs — press Calculate
⟡ answer ⟡ —
n multichoose k = C(n + k – 1, k)