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

Hacker
Rank
Score
42
flag of South Africa
100.00
43
flag of Kenya
100.00
44
flag of United States
100.00
45
flag of United States
100.00
46
flag of Singapore
100.00
48
flag of New Zealand
100.00
49
flag of Australia
100.00
51
flag of United States
100.00
52
flag of India
100.00
53
flag of Sweden
100.00
55
flag of United States
100.00
56
flag of Russia
100.00
57
flag of United States
100.00
59
flag of Japan
100.00
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