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

Hacker
Rank
Score
603
flag of Argentina
22.22
604
flag of India
22.22
605
flag of India
22.22
607
flag of United States
22.22
609
flag of Australia
22.22
610
flag of United States
22.22
611
flag of India
22.22
612
flag of India
22.22
613
flag of Turkey
22.22
614
flag of United States
22.22
615
flag of India
22.22
616
flag of United Kingdom
22.22
617
flag of India
22.22
619
flag of Republic of Korea
22.22
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