N,D,K=map(int,input().split())
now=N*D+1


dp=[[0]*(N*D+1) for _ in range(N+1)]
d=10**9+7
dp[0][0]=1
for i in range(N):
  for j in range(i,K-(N-i-1)):
    if dp[i][j]:
      dp[i][j+1]+=dp[i][j]
      dp[i][j+1]%=d
      if 1+j>K:
        continue
      dp[i+1][1+j]+=dp[i][j]
      dp[i+1][1+j]%=d
      if D+j+1>K:continue
      dp[i+1][D+j+1]-=dp[i][j]
      dp[i+1][D+j+1]%=d

print(dp[-1][K])