On Challenges
Public Posts  
Palindromic Infinite Sequence #469 public  R2D2 2d:21h  
Meaning of Life #58 public  zilet 1м:2w  
A Staggering Sequence #450 public  Philippe_57721 3м:2w  
Convex numbers #414 public  sinan 5м:1w  
Into the 4th dimension #418 public  liuguangxi 5м:3w  
BrainForce #425 public  sinan 5м:4w  
Minimise it #323 public  C_K_Yang 5м:4w  
Maximising a Ratio #210 public  sinan 6м  
Friedman Numbers #422 public  sinan 6м  
A special sequence #197 public  sinan 6м:1w 
New Members
 nebula001 2d:21h
 PeterisP 1w
 Arun_CoDeR 1w
 hankim 2w:3d
 chfmoe 3w
Fresh Problems

Kimberling Sequence 1d:2h
solved by 6 
Palindromic Infinite Sequence 1w:1d
solved by 3 
Convergents of infinite sum 1w:5d
solved by 5 
Permutation Order II 2w:1d
solved by 8 
Integral circle packings 2 2w:4d
solved by 3