n> = 3 ? +3
(? 2 + 2) 166 = 3 ? 2 +3 ? +3
(? 2 + 2) 167 = 6 ? 2 +3
(? 2 + 2) 168 = 2 ? 2 + ? +6
(? 2 + 2) 169 = ? 2 span> +6 ? +4
(? 2 + 2) 170 = 5 ? 2 +5 ? +2
(? 2 + 2) 171 = 6
(? 2 + 2) 172 = 6 ? 2 +5
(? 2 + 2) 173 = 4 ? 2 + ? +3
(? 2 + 2) 174 = 4 ? +5
(...