import java.util.*

fun main(args: Array<String>) {
    val sc = Scanner(System.`in`)
    val N = sc.nextInt()
    val a = IntArray(9) { 1 }
    val mod = 1000000007
    var ans = 1
    for (i in 1..N) {
        for (j in 1..8) a[j] = (a[j]+a[j-1]) % mod
        ans = (ans+a[8]) % mod
    }
    println(ans)
}