Created
October 17, 2009 22:24
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| tr = (^2) . ((-)1) . (2*) | |
| tl n = tr n - 2 * (n - 1) | |
| br n = tr n - 4 * (n - 1) | |
| bl n = tr n - 6 * (n - 1) | |
| putStrLn $ show $ (+1) $ sum $ map (\f -> sum $ map f [2..501]) [tr, tl, br, bl] |
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