1, 3
1, 3, 1, 2, 2а, 4, 6, 8
1, 3, 1, 2, 2а, 4, 6, 8, 1, 11, 13, 15, 17, 19, 2, 21, 23, 3, 4, 5, 6, 7, 8, 9, 9а