Thhe magic Numbers

I am at work - this is what me and Dave are talking about:

Dave: right who did the original 3 is a magic number?

Crispin: is this a quiz?

Dave: kind of - i am confused cos the version i thought was the orig is actually by "blind melon"

Crispin: i dunno but blind melon were and are shit

and

3 is not a magic number

the magic numbers are:

2, 8, 20, 28, 50, 82, 126

Dave: why