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

Hacker
Rank
Score
601
flag of United Kingdom
22.22
602
flag of India
22.22
603
flag of United States
22.22
604
flag of United States
22.22
606
flag of Netherlands
22.22
608
flag of United States
22.22
609
flag of Ireland
22.22
610
flag of Ireland
22.22
612
flag of United States
22.22
613
flag of United States
22.22
614
flag of Italy
22.22
615
flag of India
22.22
616
flag of India
22.22
617
flag of United States
22.22
618
flag of India
22.22
620
flag of India
22.22
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