n | a(n) |
---|---|
0 | 2 |
1 | 1 |
2 | 2 |
3 | 6 |
4 | 22 |
5 | 91 |
6 | 408 |
7 | 1938 |
8 | 9614 |
9 | 49335 |
10 | 260130 |
11 | 1402440 |
12 | 7702632 |
13 | 42975796 |
14 | 243035536 |
15 | 1390594458 |
16 | 8038677054 |
17 | 46892282815 |
18 | 275750636070 |
19 | 1633292229030 |
20 | 9737153323590 |
21 | 58392041019795 |
22 | 352044769046880 |
23 | 2132866978427640 |
[2,1,2,6,22,91,408,1938,9614,49335,260130,1402440, 7702632,42975796,243035536,1390594458,8038677054, 46892282815,275750636070,1633292229030, 9737153323590,58392041019795,352044769046880, 2132866978427640] |