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

Hacker
Rank
Score
61
flag of Canada
100.00
62
flag of France
100.00
63
flag of United States
100.00
64
flag of India
100.00
65
flag of India
100.00
66
flag of Lithuania
100.00
68
flag of Ukraine
100.00
69
flag of India
100.00
70
flag of France
100.00
72
flag of United States
100.00

[deleted]

73
flag of null
100.00
74
flag of Poland
100.00
75
flag of United States
100.00
76
flag of Bulgaria
100.00
77
flag of United States
100.00
78
flag of China
100.00
79
flag of China
100.00
80
flag of United States
100.00
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