Project Euler #173: Using up to one million tiles how many different "hollow" square laminae can be formed?

Hacker
Rank
Score
701
flag of India
22.22
702
flag of India
22.22
705
flag of India
22.22

[deleted]

708
flag of Cuba
22.22
709
flag of India
22.22
710
flag of India
22.22
711
flag of India
22.22
712
flag of India
22.22
713
flag of Pakistan
22.22
714
flag of Canada
22.22
716
flag of Germany
22.22
717
flag of Netherlands
22.22
718
flag of India
22.22
719
flag of Taiwan
22.22
720
flag of Singapore
22.22
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