#include <fstream>
#include <algorithm>
#include <assert.h>
ifstream in("dream.in");


long unsigned left[11][4000];
long unsigned h,w;

long unsigned akt[20];

long unsigned visit(long unsigned);

long unsigned fuelle(long unsigned zeile, int pos)
{
  long unsigned a=akt[zeile];
  long unsigned res=0;
  while((a&(1<<pos))!=0&&pos>=0)
    pos--;
  if (pos<=-1) return visit(zeile+1);
  if (pos>0&&(!(a&(1<<(pos-1)))))
    {
      akt[zeile]=a|(3<<(pos-1));
      res=fuelle(zeile,pos-1);
      //res=visit(zeile);
      akt[zeile]=a;
    }
  if (zeile<h-1)
    {
      akt[zeile]=a|(1<<(pos));
      long unsigned an=akt[zeile+1];
      akt[zeile+1]=an|(1<<(pos));
      res+=fuelle(zeile,pos-1);
      akt[zeile]=a;
      akt[zeile+1]=an;
    }
  return res;
}

long unsigned visit(long unsigned zeile)
{
  assert(akt[zeile]<3000);
  if (zeile==h) return 1;
  if (left[zeile][akt[zeile]]!=-1) return left[zeile][akt[zeile]];
  else
    {
      long unsigned res=fuelle(zeile,w-1);
      left[zeile][akt[zeile]]=res;
      return res;
    }
}

long unsigned main()
{
  while(1)
    {
      in>>h>>w;
      if (h==0&&w==0) break;
      for (long unsigned i=0; i<h; i++)
	fill_n(left[i],3000,-1);
      fill_n(akt,20,0);
      if ((h*w)&1) cout<<0<<endl;
      else
	cout<<visit(0)<<endl; 
    }
}