n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 6 |
4 | 22 |
5 | 94 |
6 | 446 |
7 | 2294 |
8 | 12542 |
9 | 71974 |
10 | 429342 |
11 | 2643606 |
12 | 16710382 |
13 | 107980870 |
14 | 710933118 |
15 | 4756345750 |
16 | 32265548622 |
17 | 221540438502 |
18 | 1537355395934 |
19 | 10768777480374 |
20 | 76063545106670 |
21 | 541277072787334 |
22 | 3877624448977150 |
[1,1,2,6,22,94,446,2294,12542,71974,429342, 2643606,16710382,107980870,710933118,4756345750, 32265548622,221540438502,1537355395934, 10768777480374,76063545106670,541277072787334, 3877624448977150] |