JAVASCRIPT

Tribonacci Sequence in JavaScript

function tribonacci(signature,n){  
  for (var i = 0; i < n-3; i++) { // iterate n times
    signature.push(signature[i] + signature[i+1] + signature[i+2]); // add last 3 array items and push to trib
  }
  return signature.slice(0, n); //return trib - length of n
}

tribonacci sequence javascript

function tribonacci(s,n){
  var arr = [];
  for(var i=0; i<n; i++) {
    arr.push((i<3) ? s[i] : arr[i-1]+arr[i-2]+arr[i-3]);
  }
  return arr;
}