from collections import *
from functools import *
from itertools import *
from heapq import *
import sys,math
input = sys.stdin.readline

N = int(input())


ans = -1
for i in range(N):
    
    j = N - i
    
    ans = max(ans,(i+1)*(j+1)- 1)
print(ans%(10**6 + 7))