#n a(n) set
2 1 {0, 1}
3 3 {0, 1, 2}
4 6 {0, 1, 2, 4}
5 9 {0, 1, 2, 3, 6}
6 13 {0, 1, 2, 3, 6, 10}
7 17 {0, 1, 2, 3, 4, 8, 13}
8 24 {0, 1, 2, 4, 8, 13, 18, 22}
9 30 {0, 1, 2, 4, 10, 15, 17, 22, 28}
10 36 {0, 1, 2, 3, 6, 12, 19, 20, 27, 33}
11 42 {0, 1, 2, 3, 4, 9, 16, 20, 26, 30, 37}