lmarinho

### Keybase proof

I hereby claim:

  * I am lmarinho on github.
  * I am lmarinho (https://keybase.io/lmarinho) on keybase.
  * I have a public key ASAFiBO-LJe3a4RRLo7mcS4z88PoWoX1OSZbbJJueJRUnwo

To claim this, I am signing this object:

lmarinho

(defn digits [n]
  (->> n
    (iterate #(quot % 10))
    (take-while #(> % 0))
    (map #(rem % 10))
    reverse))

(defn happy-step [n] (->> n digits (map #(* % %)) (reduce +)))

(defn happy-set [n]