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Old 2008-05-19, 14:57   #9
lavalamp
 
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Oct 2007
London, UK

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It would appear that there are an awful lot of these out there, so perhaps the challange should be to find a square with the lowest standard deviation of column/row/diagonal totals.

I'll start the ball rolling with a slightly modified version of the last square I posted, with an s.d. of 84.51:
Code:
			      239
                                 
                           /     
                          /      
                         /       
                                 
3,   5,   7,   11,  17   ---  43 
                                 
13,  19,  29,  23,  43   ---  127
                                 
31,  67,  61,  47,  71   ---  277
                                 
53,  59,  89,  73,  37   ---  311
                                 
79,  83,  41,  97,  101  ---  401
                                 
 |    |    |    |    |   \       
 |    |    |    |    |    \      
 |    |    |    |    |     \     
                                 
179  233  227  251  269       257

Last fiddled with by lavalamp on 2008-05-19 at 15:06
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