n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 3 |
4 | 5 |
5 | 12 |
6 | 33 |
7 | 97 |
8 | 381 |
9 | 1490 |
10 | 7757 |
11 | 42774 |
12 | 307960 |
13 | 2294754 |
14 | 22718581 |
15 | 231171797 |
16 | 3121763126 |
17 | 43651298703 |
18 | 807916379400 |
19 | 15440457456928 |
20 | 391605380566734 |
21 | 10243338678890245 |
22 | 355535039683009851 |
[1,1,2,3,5,12,33,97,381,1490,7757,42774,307960, 2294754,22718581,231171797,3121763126,43651298703, 807916379400,15440457456928,391605380566734, 10243338678890245,355535039683009851] |