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

Hacker
Rank
Score
461
flag of India
44.44
462
flag of India
44.44
463
flag of Peru
44.44
464
flag of India
44.44
469
flag of India
44.44
471
flag of India
44.44
472
flag of Mexico
44.44
473
flag of India
44.44
474
flag of India
44.44
475
flag of Switzerland
44.44
476
flag of Slovakia
44.44
477
flag of India
44.44
480
flag of Czech Republic
44.44
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