Created
May 22, 2018 20:28
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| series :: Int -> [Int] | |
| series n = go where go = n : (zipWith (+) go $ fmap mirror go) | |
| mirror :: Int -> Int | |
| mirror = undigits . digits | |
| digits :: Int -> [Int] | |
| digits = map (`mod` 10) . takeWhile (/= 0) . iterate (`div` 10) | |
| undigits :: [Int] -> Int | |
| undigits = foldl' f 0 where f r i = 10 * r + i |
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