Interesting patterns
Interesting patterns
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- d_gitale0
- is it still a pattern if all shapes are unique?sarahfailin
- yesd_gitale
- imbecile0
1804 - 1 billion
1927 - 2 billion
1959 - 3 billion
1974 - 4 billion
1987 - 5 billion
1999 - 6 billion
2011 - 7 billion
???? - 8 billion
