Calculate the number of domains which can exist
How would I go calculating it? I can't seem to find a formula (I suck at maths)

What I know;
 
- Any letters and numbers, and the dash sign (-)

- Maximum of 253 chars, minimum of 2 chars

How would I calculate this?
Calculate the number of domains which can exist
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How would I go calculating it? I can't seem to find a formula (I suck at maths)

What I know;
 
- Any letters and numbers, and the dash sign (-)

- Maximum of 253 chars, minimum of 2 chars

How would I calculate this?