n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 3 |
3 | 13 |
4 | 63 |
5 | 324 |
6 | 1736 |
7 | 9589 |
8 | 54223 |
9 | 312369 |
10 | 1826847 |
11 | 10818156 |
12 | 64737684 |
13 | 390877456 |
14 | 2378312780 |
15 | 14568360645 |
16 | 89766137967 |
17 | 556008951667 |
18 | 3459976045201 |
19 | 21621154097573 |
20 | 135619427912599 |
21 | 853590782088272 |
22 | 5389272616262656 |
23 | 34123058549079788 |
24 | 216621704634708868 |
[1,1,3,13,63,324,1736,9589,54223,312369,1826847, 10818156,64737684,390877456,2378312780, 14568360645,89766137967,556008951667, 3459976045201,21621154097573,135619427912599, 853590782088272,5389272616262656, 34123058549079788,216621704634708868] |