N 3 2 5 July 8, 2019 16 32 64 128 N 2 3 5 6 N n 3 )/ 2 54 N 3 2 n 5 4 N 1 3 2 5 N 2 3 4 5 1 4 N 2 3 4 5 6 2 7m n 3 5m 2 7n N 5 3 k 2 5 1 n 2 3 4 5 gear pattern bikes 1 n 2 3 4 5 6 motorcycle N 6 3 2 5 0 8 1 n 2 3 4 5 6 N 3 5n 2 9n 45 N 3 5n 2 50n N 3 5n 2