n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 6 |
4 | 21 |
5 | 105 |
6 | 530 |
7 | 3710 |
8 | 27265 |
9 | 229705 |
10 | 2083354 |
11 | 24025694 |
12 | 263359173 |
13 | 3457302849 |
14 | 44575118874 |
15 | 600902614598 |
16 | 9242750538593 |
17 | 169974915437041 |
18 | 2905860232733458 |
19 | 56257078771371478 |
20 | 1041600031067604437 |
21 | 19990420041926339577 |
22 | 419763750266646291714 |
[1,1,2,6,21,105,530,3710,27265,229705,2083354, 24025694,263359173,3457302849,44575118874, 600902614598,9242750538593,169974915437041, 2905860232733458,56257078771371478, 1041600031067604437,19990420041926339577, 419763750266646291714] |