A special number
mdenhoed C_K_Yang liuguangxi mafia Burloq medialuna eulerscheZahl Akorlith Min_25 smutley Philippe_57721 kumaus gerrob zilet hallvabo sinan caveman666 benito255 lesnik7 R2D2 djcomidi Caesum Buri teebee dloser jablonskim nielkh elasolova
Public  05/25/14  4xp  Programming  38.6% 
Find the biggest number whose any 4 consecutive digits sum to a square number and whose any decimal digit is not used more than 5 times.
For example 522007 is such a number: 5+2+2+0=9, 2+2+0+0=4, 2+0+0+7=9
For example 522007 is such a number: 5+2+2+0=9, 2+2+0+0=4, 2+0+0+7=9
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