codewars029: Tribonacci Sequence

http://www.codewars.com/kata/tribonacci-sequence/train/java

6 kyu

package codewars;
//http://www.codewars.com/kata/tribonacci-sequence/train/java
public class Xbonacci{
  public double[] tribonacci(){
    double[] arr = new double[n];
    if(n == 0){
      return arr;
    }
    int size = n < 3 ? n : 3;
    for(int i = 0; i < size; i++){
      arr[i] = s[i];
    }
    if(n <= 3){
      return arr;
    }
    for(int i = 3; i < n; i++){
      arr[i] = arr[i - 1] + arr[i - 2] + arr[i - 3];
    }
  }
}