#define MD 998244353
{
	int @n;
	Mint z=0;
	Mint c=1;
	Mint y=Mint(2)**n;
	Mint inv16=Mint(1)/16;
	REP(i,0,n/4*2+2,2){
		z+=y*c;
		y*=inv16;
		c*=n-i;
		c*=n-i-1;
		c/=i+1;
		c/=i+2;
	}
	Mint x=Mint(2)**(4-(n&3));
	REP(i,n/4*2+2,n+1,2){
		z+=x*c;
		x*=16;
		c*=n-i;
		c*=n-i-1;
		c/=i+1;
		c/=i+2;
	}
	wt(z*2);
}