#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<vector<ll>>> gula;

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

int main(){
	ll d,r;
	cin>>d>>r;
	gula = vector<vector<vector<ll>>>(d+1,vector<vector<ll>>(r*r*d+1,vector<ll>(r*d+1,-1)));
	cout<< objem(d,r*r,0) <<'\n';
}