n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 6 |
4 | 26 |
5 | 140 |
6 | 882 |
7 | 6349 |
8 | 51284 |
9 | 457704 |
10 | 4459940 |
11 | 47019819 |
12 | 532485538 |
13 | 6438774524 |
14 | 82710138994 |
15 | 1123798871990 |
16 | 16090426592488 |
17 | 241979954659728 |
18 | 3811335657375786 |
19 | 62712512310820402 |
20 | 1075527196672980525 |
21 | 19186234784992217621 |
22 | 355349469934379290700 |
[1,1,2,6,26,140,882,6349,51284,457704,4459940, 47019819,532485538,6438774524,82710138994, 1123798871990,16090426592488,241979954659728, 3811335657375786,62712512310820402, 1075527196672980525,19186234784992217621, 355349469934379290700] |