#pragma GCC optimize("Ofast")
#pragma GCC optimize("unroll-loops")
//#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,fma,abm,mmx,avx,avx2,tune=native")
#include <bits/stdc++.h>
using namespace std;
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace __gnu_pbds;
#ifdef rd
#define trace(...) cout<<"Line:"<<__LINE__<<" "; __f(#__VA_ARGS__, __VA_ARGS__)
template<typename Arg1>
void __f(const char *name, Arg1 &&arg1) {
	cout<<name<<" : "<<arg1<<endl;
}
template<typename Arg1, typename ... Args>
void __f(const char *names, Arg1 &&arg1, Args &&... args) {
	const char *comma=strchr(names+1,',');
	cout.write(names,comma-names)<<" : "<<arg1<<" | ";
	__f(comma+1,args...);
}
#else
#define trace(...)
#define endl '\n'
#endif
#define pb push_back
#define fi first
#define se second
#define int long long
typedef long long ll;
typedef float f80;
#define double long double
#define pii pair<int,int>
#define pll pair<ll,ll>
#define sz(x) ((long long)x.size())
#define fr(a,b,c) for(int a=b; a<=c; a++)
#define rep(a,b,c) for(int a=b; a<c; a++)
#define trav(a,x) for(auto &a:x)
#define all(con) con.begin(),con.end()
const ll infl=0x3f3f3f3f3f3f3f3fLL;
const int infi=0x3f3f3f3f;
//const int mod=998244353;
const int mod=1000000007;
typedef vector<int> vi;
typedef vector<ll> vl;
typedef tree<int, null_type, less<int>, rb_tree_tag, tree_order_statistics_node_update> oset;
auto clk=clock();
mt19937_64 rang(chrono::high_resolution_clock::now().time_since_epoch().count());
int rng(int lim) {
	uniform_int_distribution<int> uid(0,lim-1);
	return uid(rang);
}
int powm(int a, int b, int mod) {
	int res=1;
	while(b) {
		if(b&1)
			res=(res*a)%mod;
		a=(a*a)%mod;
		b>>=1;
	}
	return res;
}


int cnt[51];
int dp[51][2501]={{1},{1,1},{1,2,3},{1,3,7,9,4},{1,4,12,24,35,24,20},{1,5,18,46,93,137,148,136,100,36},{1,6,25,76,187,366,591,744,884,832,716,360,252},{1,7,33,115,327,765,1523,2553,3696,4852,5708,5892,5452,4212,2844,1764,576},{1,8,42,164,524,1400,3226,6436,11323,17640,25472,33280,40520,44240,45512,40608,35496,25632,18108,8064,5184},{1,9,52,224,790,2350,6072,13768,27821,50461,83420,127840,182256,242272,301648,350864,382576,389232,373536,332640,273060,208548,136512,81792,46656,14400},{1,10,63,296,1138,3708,10538,26480,59673,121626,226787,390144,628744,949472,1355952,1826464,2341600,2833632,3282464,3584160,3765600,3719664,3531924,3093336,2642364,2010240,1508544,963072,621504,259200,158400},{1,11,75,381,1582,5582,17222,47194,116457,261163,537459,1022981,1817652,3040352,4810720,7230928,10360160,14178912,18577792,23327872,28132048,32571504,36310464,38903904,40028724,39552156,37457388,33941412,29314944,24179904,18835776,13777344,9452736,5716800,3211200,1742400,518400},{1,12,88,480,2137,8096,26860,79376,211811,515308,1153268,2391936,4633331,8438664,14557048,23874176,37407760,56117824,80906752,112162240,150052400,193572736,241706624,291576384,341323776,386160048,424359540,450394992,464545584,461528208,446428476,413557632,373573440,321120000,268449408,210332160,162330624,112550400,77788800,46540800,28497600,11404800,6739200},{1,13,102,594,2819,11391,40344,127508,364587,952559,2293742,5126898,10710633,21042989,39117852,69175664,116857024,189256368,294745440,442503456,641759376,900689616,225195321,617201401,74227554,586823330,140227131,711888699,274217080,795069832,242715461,585116357,796764497,861974465,769155485,525176285,146566301,650715556,73773796,455145195,828946802,226153586,685663993,216281593,828705600,536385600,309484800,166924800,87609600,25401600},{1,14,117,724,3645,15626,58741,197280,600215,1671266,4295107,10259436,22922995,48184950,95816051,181136304,327071752,566117888,942525072,513281017,349163810,532145419,154557773,309226767,88509354,563257605,789064441,766807654,474675580,795689314,599134613,627066840,658988947,307608398,337632800,295701193,44870369,150212311,705302359,336038622,452522163,797367958,62674553,57993322,777736994,845298906,452367755,90655804,810196653,976943895,564798323,582118351,994783972,869862386,697759993,660441600,381024000},{1,15,133,871,4633,20979,83313,295803,952299,2809009,7656027,19414457,46086247,102967901,217634463,437195525,838372452,540635289,722168530,638311860,640827391,196046908,898688562,478199884,793020369,808862771,562236075,94791602,385333320,237794527,197694759,398043392,504456766,579736664,78137089,793367253,961295251,280517488,179779783,947563092,901772777,859566930,199212409,920781370,362900807,735004334,297264154,482748036,653703312,140400674,623159781,320434095,373194802,13313867,205909676,360223815,570584277,68075848,372652149,961247580,23084534,261139053,151302323,715359965,625702393},{1,16,150,1036,5802,27648,115538,431844,1464468,4554040,13096378,35069940,87969166,207781760,464351910,986188668,998611836,879505923,237509223,15110629,621334822,88677622,257578542,963016850,235638961,442107823,429101453,483004748,329733855,718448185,266304376,413950543,256286771,626720357,318467482,59069608,81901162,352730851,104241055,503595237,956355036,534522134,457799859,108929893,887297322,424614770,265024591,876853471,515703045,692038809,210906163,20070317,468291405,145357835,797577421,232358134,747771239,343859985,833879609,78548665,289896769,449285934,313197004,379603290,397630660,609910102,442642726,627950853,722186028,705163253,998661511,771071664,636940611},{1,17,168,1220,7172,35852,157132,616084,2192506,7159090,21631676,60902460,160707468,399489140,939796228,101060910,481320121,151453550,952463061,931694473,957528293,554162053,990142499,644946993,651797781,791594351,556120466,271969917,107619398,710253075,280526462,615698879,99748930,775178221,257586036,645364809,806795120,340635512,801741075,790520661,68328385,331513794,351728404,931812262,91105169,176869824,445724501,370449983,359815736,918724628,869062973,659791249,657727222,395793733,32692523,78858425,151369211,628504487,842750087,152091477,889718876,908002421,944598446,656459208,712920845,47550280,92244967,110652620,951703750,217822851,901098263,655149074,861896271,859184013,992613245,768042116,807916959,335381553,909568095,153171069,827990317,681893483},{1,18,187,1424,8764,45832,210072,861400,3206786,10957868,34666130,102239488,282743580,736889224,817936097,262532028,534038590,412279142,965109380,86702267,846482566,945052509,644517943,548776024,679330947,152291502,882910517,188127435,636778925,902059202,132531208,193904122,893705022,246193070,652079051,958060250,148697872,504141990,371410212,807466717,514477363,565424570,560794838,11419155,215137208,665710713,791504234,359367396,224050172,509091270,125989128,782600310,957126038,667219607,386301613,605448653,296557741,618019404,194294675,222923480,765962783,743934970,24324611,512643153,214242880,286900578,228877964,91240846,430467141,533029377,904804693,373207899,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void solve(int i) {
//	freopen("out.txt","r",stdin);
	int tol=0;
	fr(i,1,50) {
		fr(j,1,i)
			cnt[i]+=abs(i-j-j+1);
		cnt[i]/=2;
	}
	int n,k;
	cin>>n>>k;
	if(k&1) {
		cout<<0<<endl;
	} else
		cout<<dp[n-1][k/2]<<endl;
}
 
signed main() {
	ios_base::sync_with_stdio(0),cin.tie(0),cout.tie(0);
	srand(chrono::high_resolution_clock::now().time_since_epoch().count());
	cout<<fixed<<setprecision(10);
	int t=1;
//	cin>>t;
	fr(i,1,t) {
		solve(i);
	}
#ifdef rd
	cout<<endl<<endl<<endl<<endl<<"Time elapsed: "<<(double)(clock()-clk)/CLOCKS_PER_SEC<<endl;
#endif
	return 0;
}


Measured memory_bytes: 256