n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 6 |
4 | 23 |
5 | 107 |
6 | 583 |
7 | 3633 |
8 | 25444 |
9 | 197620 |
10 | 1684295 |
11 | 15618141 |
12 | 156453857 |
13 | 1683050189 |
14 | 19344093070 |
15 | 236497985706 |
16 | 3063827565763 |
17 | 41916787157011 |
18 | 603799270943519 |
19 | 9132945141812301 |
20 | 144708157060239704 |
21 | 2396568154933265024 |
22 | 41403636316192616995 |
[1,1,2,6,23,107,583,3633,25444,197620,1684295, 15618141,156453857,1683050189,19344093070, 236497985706,3063827565763,41916787157011, 603799270943519,9132945141812301, 144708157060239704,2396568154933265024, 41403636316192616995] |