n | a(n) |
---|---|
1 | 1 |
2 | 3 |
3 | 13 |
4 | 55 |
5 | 225 |
6 | 907 |
7 | 3637 |
8 | 14559 |
9 | 58249 |
10 | 233011 |
11 | 932061 |
12 | 3728263 |
13 | 14913073 |
14 | 59652315 |
15 | 238609285 |
16 | 954437167 |
17 | 3817748697 |
18 | 15270994819 |
19 | 61083979309 |
20 | 244335917271 |
21 | 977343669121 |
22 | 3909374676523 |
23 | 15637498706133 |
24 | 62549994824575 |
25 | 250199979298345 |
26 | 1000799917193427 |
[1,3,13,55,225,907,3637,14559,58249,233011,932061, 3728263,14913073,59652315,238609285,954437167, 3817748697,15270994819,61083979309,244335917271, 977343669121,3909374676523,15637498706133, 62549994824575,250199979298345,1000799917193427] |