Hexagrammes (5)

Série des triples et séquence 132645 :

1 => 1
3 => 3
2 => 9 - 7 = 2
6 => 27 - (7 x 3) = 6
4 => 81 - (7 x 11) = 4
5 => 243 - (7 x 34) = 5