import sys
input=lambda: sys.stdin.readline().rstrip()
n,d,k=map(int,input().split())
mod=10**9+7
A=[0]*(n*d+1)
A[0]=1
for _ in range(n):
  B=[0]*(n*d+1)
  for i in range(n*d+1):
    if not A[i]:
      continue
    else:
      for j in range(d):
        if i+j<=n*d:
          B[i+j+1]=(B[i+j+1]+A[i])%mod
  A=B
print(A[k])