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<blotter> ps >test
author HackBot
date Mon, 17 Feb 2014 03:26:43 +0000
parents 1baee8e6ee55
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import Data.List(inits);main = let p = 1 : zipWith (+) (map (*4) p) (map (sum . zipWith (*) p . reverse) (inits p)) in print $ p !! 1000