n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | 3 |
4 | 8 |
5 | 23 |
6 | 68 |
7 | 217 |
8 | 738 |
9 | 2662 |
10 | 10111 |
11 | 40281 |
12 | 167605 |
13 | 725850 |
14 | 3262107 |
15 | 15175084 |
16 | 72908536 |
17 | 361068922 |
18 | 1839982245 |
19 | 9633358049 |
20 | 51746379547 |
21 | 284824200163 |
22 | 1604632175859 |
23 | 9243292234736 |
24 | 54390064543757 |
25 | 326645626694244 |
26 | 2000556362576213 |
27 | 12485902607285611 |
[1,1,1,3,8,23,68,217,738,2662,10111,40281,167605, 725850,3262107,15175084,72908536,361068922, 1839982245,9633358049,51746379547,284824200163, 1604632175859,9243292234736,54390064543757, 326645626694244,2000556362576213, 12485902607285611] |