
function Main(input) {
	  var inputs = input.split(' ');
	  var K = Number(inputs[0]);
	  var S = Number(inputs[1]);
	  var count = 0;
	  for(var X = 0; X <= K; X++) {
	    for(var Y = 0; Y <= K; Y++) {
	      var Z = (S - X - Y);
	      if(0 <= Z && Z <= K) {
	        count++;
	      }
	    }
	  }
	  console.log(count);
	}

	Main(require("fs").readFileSync("/dev/stdin", "utf8"));