n | a(n) |
---|---|
1 | 1 |
2 | 2 |
3 | 2 |
4 | 15 |
5 | 41 |
6 | 716 |
7 | 2847 |
8 | 83440 |
9 | 426422 |
10 | 18171918 |
11 | 112072316 |
12 | 6423127757 |
13 | 46054057965 |
14 | 3376465219485 |
15 | 27457462735926 |
16 | 2486327138729353 |
17 | 22530435476364494 |
18 | 2454996141671330713 |
19 | 24463971326544703312 |
[1,2,2,15,41,716,2847,83440,426422,18171918, 112072316,6423127757,46054057965,3376465219485, 27457462735926,2486327138729353,22530435476364494, 2454996141671330713,24463971326544703312] |