n | a(n) |
---|---|
1 | 1 |
2 | 9 |
3 | 45 |
4 | 201 |
5 | 819 |
6 | 3231 |
7 | 12321 |
8 | 46209 |
9 | 170370 |
10 | 621316 |
11 | 2240838 |
12 | 8011584 |
13 | 28395213 |
14 | 99845553 |
15 | 348333411 |
16 | 1205925033 |
17 | 4142850423 |
[1,9,45,201,819,3231,12321,46209,170370,621316, 2240838,8011584,28395213,99845553,348333411, 1205925033,4142850423] |