n | a(n) |
---|---|
2 | 3 |
3 | 6 |
4 | 15 |
5 | 45 |
6 | 153 |
7 | 561 |
8 | 2145 |
9 | 8385 |
10 | 33153 |
11 | 131841 |
12 | 525825 |
13 | 2100225 |
14 | 8394753 |
15 | 33566721 |
16 | 134242305 |
17 | 536920065 |
18 | 2147581953 |
19 | 8590131201 |
20 | 34360131585 |
21 | 137439739905 |
22 | 549757386753 |
23 | 2199026401281 |
24 | 8796099313665 |
25 | 35184384671745 |
[3,6,15,45,153,561,2145,8385,33153,131841,525825, 2100225,8394753,33566721,134242305,536920065, 2147581953,8590131201,34360131585,137439739905, 549757386753,2199026401281,8796099313665, 35184384671745] |