n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 4 |
4 | 11 |
5 | 40 |
6 | 176 |
7 | 907 |
8 | 5360 |
9 | 35668 |
10 | 263789 |
11 | 2146390 |
12 | 19054040 |
13 | 183248581 |
14 | 1897952690 |
15 | 21061861828 |
16 | 249309196559 |
17 | 3135518918800 |
18 | 41754612283244 |
19 | 586922460056851 |
20 | 8684272948653068 |
21 | 134919751191875572 |
22 | 2195942678525060093 |
23 | 37365571515146318650 |
[1,1,2,4,11,40,176,907,5360,35668,263789,2146390, 19054040,183248581,1897952690,21061861828, 249309196559,3135518918800,41754612283244, 586922460056851,8684272948653068, 134919751191875572,2195942678525060093, 37365571515146318650] |