F_n=2^{2^n}+1\ \ \ (n=0,1,2,\cdots)
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Recent Referers:
  1. http://formula.s21g.com/?F_n%3D2%5E%7B2%5En%7D+1%5C%20%5C...
  2. http://formula.s21g.com/
  3. http://blog.s21g.com/articles/2012.8
  4. http://blog.s21g.com/articles/2276
  5. http://blog.s21g.com/?page=7