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

Hacker
Rank
Score
321
flag of India
100.00
324
flag of India
100.00
330
flag of India
100.00
331
flag of Netherlands
100.00
332
flag of Thailand
100.00
333
flag of India
100.00
334
flag of United States
100.00
335
flag of United States
100.00
336
flag of Netherlands
100.00
338
flag of India
100.00
339
flag of New Zealand
100.00
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