Not a lesson but! need help!

NOT A LESSON BUT! NEED HELP!

i am trying to produce taxicab numbers. sometimes, this does not work because this code uses too much memory. Any tips on how to make this utilize less space?



var sums = [];
      var way1 = [];
      var ways2 =[];
      var ways3 = [];
      function cab(a, n) {
          var y = 0;
          
            for(var x = 1;x < a; x++){
              for(var o =1; o < a;o++){
              sums.push((Math.pow(x,3) + Math.pow(o,3)));
              
              }
              
            }
            
            sums.toString();
            sums.sort();
            parseInt(sums);
            for(var i = 0; i < sums.length; i++){
              y = 0;
              for(var p  = 0; p < sums.length;p++){
                if(sums[p] === sums[i] && sums[i-1] !== sums[i]){
                  y++;                 
                }
                
              }
              
              
              if(y/2 < 2 && sums[i-1] !== sums[i] ){
                way1.push(sums[i]);
                
                
              }else if(y/2 === 2){
                ways2.push(sums[i]);
                
              }else if(y/2 === 3){
                ways3.push(sums[i]);
              }
              
            }
            
            way1.toString();
            way1.sort(function(a,b){return a - b;});
            parseInt(way1);
            
            
            
            
            ways2.toString();
            ways2.sort(function(a,b){return a - b;});
            parseInt(ways2);
            
            ways3.toString();
            ways3.sort(function(a,b){return a - b;});
            parseInt(ways3);
            
            if(n === 1){           
              return "[" + way1[0] + "]";
            }else if(n === 2){
              return "[" + ways2[0] + "]";
            }else{
              return ways3[0];
            }
            
        
      };

 cab(200,2);

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