Wordpress Options as an Array

[Acids]

I posted previously trying to find out how to get my data that is stored in a database, but then Ive thought what if i just use arrays?
I have some code here on my Wordpress Plugin Options page which allows a user to enter a value and save it. How Can I save the value as an array so that I can call on it later?

<div>
<h2>My Plugin Options</h2>

<Form>
Define Height of Box
<input type="textbox" name="n1">

<p>
<input type="submit" value="<?php _e('Save Changes') ?>" />
</p>
</form>
</div>

Thanks