Quote:
Originally Posted by AustinSkyscrapers
Now this is a bit off topic but I've noticed something called "generic numbers". They include 1,2,3,4,5,6,7,8,10,12,15,20,22,24,25,28,30,33 and so fourth. They just come into mind. A lot of floor counts come in these generic numbers. 
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You forgot 9,11,13,14,16,17,18,19,21,23,26,27,29,31,32 and so forth...