n | a(n) |
---|---|
3 | 1 |
4 | 1 |
5 | 1 |
6 | 2 |
7 | 5 |
8 | 14 |
9 | 50 |
10 | 233 |
11 | 1249 |
12 | 7595 |
13 | 49566 |
14 | 339722 |
15 | 2406841 |
16 | 17490241 |
17 | 129664753 |
18 | 977526957 |
19 | 7475907149 |
20 | 57896349553 |
21 | 453382272049 |
22 | 3585853662949 |
23 | 28615703421545 |
[1,1,1,2,5,14,50,233,1249,7595,49566,339722, 2406841,17490241,129664753,977526957,7475907149, 57896349553,453382272049,3585853662949, 28615703421545] |