Hailstorm Numbers
<html>
<head>
<title>Hailstone Numbers</title>
</head>
<body>
<script>
var n = 9732100;
var sequence = [];
function calculateSequence() {
var counter = 0;
while (true) {
sequence[counter] = n;
if (n == 1) {
break;
}
if (n % 2 == 0) {
n = n / 2;
} else {
n = 3 * n + 1;
}
counter++;
}
}
function printSequence() {
document.write(sequence + "<br>");
document.write("Sequence Length: " + sequence.length + "<br>");
}
calculateSequence();
printSequence();
</script>
</body>
</html>
Also See
Find common values between 3 arrays. 
Find all such numbers between 1000 and 3000 (both included) such that each digit of the number is an even number. 
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