n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 1 |
3 | 3 |
4 | 11 |
5 | 42 |
6 | 167 |
7 | 684 |
8 | 2867 |
9 | 12240 |
10 | 53043 |
11 | 232731 |
12 | 1031829 |
13 | 4615542 |
14 | 20805081 |
15 | 94410363 |
16 | 430945739 |
17 | 1977366192 |
18 | 9115261211 |
19 | 42195093993 |
20 | 196060049129 |
21 | 914110333422 |
22 | 4275222950221 |
23 | 20051858039718 |
24 | 94294269673861 |
[1,0,1,3,11,42,167,684,2867,12240,53043,232731, 1031829,4615542,20805081,94410363,430945739, 1977366192,9115261211,42195093993,196060049129, 914110333422,4275222950221,20051858039718, 94294269673861] |