Code Wars Odds Prism

function rowSumOddNumbers(n) {
  let i = 0;
  let oddCount = n;
  let count = n;
  let toSum = [];
  while(n !== 0){
      oddCount += (n - 1);
      n -= 1;
  }
  while(toSum.length !== oddCount){
    if(i%2){
      toSum = [...toSum, i];
    }
    i++;
  }
  return toSum.slice(-Math.abs(count)).reduce((acc, el) => acc += el);
}