Here's mine:

  #include <stdio.h>
  #include <stdlib.h>

  long *pascal(int row) {
    long *ret = (row == 1 ? NULL : pascal(row - 1));
    ret = realloc(ret, sizeof(long) * row);
    ret[row - 1] = 1;
    for (int i = row - 2; i > 0; i--)
      ret[i] += ret[i - 1];
    return ret;
  }

  int main(int argc, char *argv[]) {
    int row = atoi(argv[1]);
    long *data = pascal(row);
    for (int i = 0; i < row; i++)
      printf("%ld ", data[i]);
    printf("\n");
    free(data);
    return 0;
  }