#include<cstdio>

using ll=long long;

#define MOD 1000000007



ll modpow(ll a, ll n)
{
	ll ret=1;
	for(;n>0;n>>=1)
	{
		if(n&1) ret=(ret*a)%MOD;
		a=(a*a)%MOD;
	}
	return ret;
}



int main(void)
{
	ll n;

	while(scanf("%lld", &n)==1)
	{
		ll ans=1;

		if(n&1) ans=3;

		ans=(ans*modpow(5, n/2-1))%MOD;
		ans=(ans*4)%MOD;

		if(n==1) ans=2;
		printf("%lld\n", ans);
	}
	return 0;
}