n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 3 |
3 | 9 |
4 | 33 |
5 | 135 |
6 | 633 |
7 | 3207 |
8 | 17589 |
9 | 102627 |
10 | 636032 |
11 | 4161120 |
12 | 28680366 |
13 | 207313084 |
14 | 1567270962 |
15 | 12344164132 |
16 | 101000981146 |
17 | 856048842064 |
18 | 7499822589206 |
19 | 67789041509948 |
20 | 631233681093760 |
21 | 6047600235405942 |
22 | 59548341631378238 |
23 | 602020901133491946 |
24 | 6243160989929600212 |
[1,1,3,9,33,135,633,3207,17589,102627,636032, 4161120,28680366,207313084,1567270962,12344164132, 101000981146,856048842064,7499822589206, 67789041509948,631233681093760,6047600235405942, 59548341631378238,602020901133491946, 6243160989929600212] |