n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | 2 |
4 | 6 |
5 | 24 |
6 | 119 |
7 | 703 |
8 | 4819 |
9 | 37596 |
10 | 328871 |
11 | 3187627 |
12 | 33907426 |
13 | 392693219 |
14 | 4918535904 |
15 | 66246158633 |
16 | 954739609059 |
17 | 14660169150206 |
18 | 238933675330056 |
19 | 4119463404086442 |
20 | 74907534899129351 |
21 | 1432718565376182929 |
[1,1,1,2,6,24,119,703,4819,37596,328871,3187627, 33907426,392693219,4918535904,66246158633, 954739609059,14660169150206,238933675330056, 4119463404086442,74907534899129351, 1432718565376182929] |