Number of non zero digits in 2^n base 3

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<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/3.4.1/chart.min.js"></script>
<script>
const n = 1000;

var data=[], powers=[], labels=[];

for (let x=2; x<n; x++) {
  let p = BigInt(Math.pow(2,x));
  let digits = p.toString(3);
  let sum = 0;
  for (let i=0; i<digits.length; i++) {
    let d = Number(digits[i]);
    if (d != 1 && d != 2 && d != 4 && d != 8)
      sum++
  }
  labels.push(x);
  powers.push(p);
  data.push(sum);
}

// plot

var ctx = document.querySelector('canvas').getContext('2d');

var myChart = new Chart(ctx, {
  type: 'line',
  data: {
    labels: labels,
    datasets: [{
      label: 'digits in ',
      data: data
    }]
  },
  
  options: {
  plugins: {
  tooltip: {
  callbacks: {
    
    label: function(context) {
      return context.parsed.y+' '+
        context.dataset.label+' '+
        powers[context.parsed.x].toString(3);

    }
  
  }}}}
});

</script>