#include <bits/stdc++.h>
using namespace std;
using ll = long long;

void print_list(vector<ll> a){
	for(auto i:a){
		cout << i << ' ';
	}
	cout << '\n';
}

int m = 1000000007;

vector<vector<ll>> gula;
vector<vector<ll>> gula2;

ll objem(ll d, ll sr) {
	if (gula[d][sr] != -1) {
		return gula[d][sr];
	}
	ll res = 0;
	if (d == 0){
		res = 1;
	} else {
		res = res + objem(d-1,sr) % m;
		for(int x=1; x*x <= sr; x++){
			res = (res + 2*objem(d-1,sr-x*x)) % m;
		}
	}
	gula[d][sr] = res;
	return res;
}

ll objem2(ll d, ll sr) {
	if (gula2[d][sr] != -1) {
		return gula2[d][sr];
	}
	ll res = 0;
	if (d == 0){
		res = 0;
	} else {
		res = res + objem2(d-1,sr) % m;
		for(int x=1; x*x <= sr; x++){
			res = (res + 2*(objem2(d-1,sr-x*x)+x*objem(d-1,sr-x*x))) % m;
			
		}
	}
	gula2[d][sr] = res;
	return res;
}

int main(){
	ll d,r;
	cin>>d>>r;
	gula = vector<vector<ll>>(d+1,vector<ll>(r*r*d+1,-1));
	gula2 = vector<vector<ll>>(d+1,vector<ll>(r*r*d+1,-1));
	cout<< objem2(d,r*r) <<'\n';
}