n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 8 |
3 | 42 |
4 | 252 |
5 | 1636 |
6 | 11188 |
7 | 79386 |
8 | 579020 |
9 | 4314300 |
10 | 32697920 |
11 | 251284292 |
12 | 1953579240 |
13 | 15336931928 |
14 | 121416356108 |
15 | 968187827834 |
16 | 7769449728780 |
17 | 62696580696172 |
18 | 508451657412496 |
19 | 4141712433518956 |
20 | 33872033298518728 |
21 | 278014853384816184 |
22 | 2289376313410678312 |
[1,2,8,42,252,1636,11188,79386,579020,4314300, 32697920,251284292,1953579240,15336931928, 121416356108,968187827834,7769449728780, 62696580696172,508451657412496,4141712433518956, 33872033298518728,278014853384816184, 2289376313410678312] |