n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 3 |
3 | 24 |
4 | 71 |
5 | 366 |
6 | 2142 |
7 | 8128 |
8 | 40063 |
9 | 223182 |
10 | 919600 |
11 | 4477496 |
12 | 24423998 |
13 | 104469379 |
14 | 508145588 |
15 | 2726623094 |
16 | 11936904927 |
17 | 58101760966 |
18 | 307770506832 |
19 | 1369729219470 |
20 | 6671075408724 |
21 | 34985537652681 |
22 | 157621462924548 |
[1,1,3,24,71,366,2142,8128,40063,223182,919600, 4477496,24423998,104469379,508145588,2726623094, 11936904927,58101760966,307770506832, 1369729219470,6671075408724,34985537652681, 157621462924548] |