Combination with Replacement Calculator

Calculate the combinations with replacement for C^R(n,r) = C(n+r-1,r) = (n+r-1)! / r! (n - 1)!. For r <= n, n >= 0, and r >= 0.

Combination with Replacement Formula:

C^R(n,r) = C(n+r-1,r) = (n+r-1)! / r! (n - 1)!.

References

For more information on combinations and binomial coefficients please see http://mathworld.wolfram.com/Combination.html