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<oerjan> sed -i \'s/[^ ]*$/"$@"/\' bin/hd
author HackBot
date Thu, 30 Jan 2014 23:07:22 +0000
parents 1baee8e6ee55
children
line wrap: on
line source

import Data.List(inits);main = let p = 1 : zipWith (+) (map (*4) p) (map (sum . zipWith (*) p . reverse) (inits p)) in print $ p !! 1000