1· 2 + 1 = 3
2· 3 + 2 = 8
3· 4 + 3 = 15
4· 5 + 4 = 24
5· 6 + 5 = 35
6· 7 + 6 = 48
7· 8 + 7 = 63
8· 1 + 8 = 16
