#define MD 998244353
ll@n,@m,@k,v[m+1],w[64]{},t=1;
v[1]=0;
w[0]=1;
rep(i,2,m+1){
	t+=m/(i-1)!=m/i;
	v[i]=t-1;
	w[t-1]+=1;
}
Matrix<Mint>a(t,t);
a=0;
rep(y,1,m+1){
	if(y==1||m/y!=m/(y-1)){
		rep(x,1,m+1){
			if(abs(m/y-m/x)<=k){
				a[v[y]][v[x]]+=1;
			}
		}
	}
}
a**=n-1;
wt(sum[y,0,t,x,0,t](a[y][x]*w[y]));