n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 3 |
3 | 8 |
4 | 23 |
5 | 66 |
6 | 199 |
7 | 601 |
8 | 1861 |
9 | 5815 |
10 | 18396 |
11 | 58684 |
12 | 188764 |
13 | 611103 |
14 | 1990361 |
15 | 6515786 |
16 | 21429510 |
17 | 70767468 |
18 | 234565319 |
19 | 780086526 |
20 | 2602209961 |
21 | 8704547698 |
22 | 29191435328 |
23 | 98125474137 |
24 | 330558122499 |
25 | 1115795428615 |
26 | 3773380090126 |
27 | 12782934685768 |
28 | 43374552366876 |
[1,1,3,8,23,66,199,601,1861,5815,18396,58684, 188764,611103,1990361,6515786,21429510,70767468, 234565319,780086526,2602209961,8704547698, 29191435328,98125474137,330558122499, 1115795428615,3773380090126,12782934685768, 43374552366876] |