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

Hacker
Rank
Score
581
flag of Netherlands
22.22
583
flag of United States
22.22
584
flag of Ireland
22.22
585
flag of Ireland
22.22
587
flag of United States
22.22
588
flag of United States
22.22
589
flag of Italy
22.22
590
flag of India
22.22
591
flag of India
22.22
592
flag of United States
22.22
593
flag of India
22.22
595
flag of India
22.22
598
flag of United States
22.22
599
flag of Sri Lanka
22.22
600
flag of India
22.22
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