n | a(n) |
---|---|
2 | 9 |
3 | 58 |
4 | 264 |
5 | 1106 |
6 | 4495 |
7 | 18014 |
8 | 71652 |
9 | 283760 |
10 | 1120806 |
11 | 4419928 |
12 | 17413572 |
13 | 68569666 |
14 | 269941451 |
15 | 1062631046 |
16 | 4183370636 |
17 | 16471711736 |
18 | 64870158866 |
19 | 255541666976 |
20 | 1006930883396 |
21 | 3968854010936 |
22 | 15648092510618 |
23 | 61714841143568 |
[9,58,264,1106,4495,18014,71652,283760,1120806, 4419928,17413572,68569666,269941451,1062631046, 4183370636,16471711736,64870158866,255541666976, 1006930883396,3968854010936,15648092510618, 61714841143568] |