n | a(n) |
---|---|
1 | 1 |
2 | 4 |
3 | 15 |
4 | 62 |
5 | 263 |
6 | 1153 |
7 | 5187 |
8 | 23792 |
9 | 110898 |
10 | 523773 |
11 | 2501268 |
12 | 12057407 |
13 | 58593831 |
14 | 286743949 |
15 | 1411905287 |
16 | 6989973590 |
17 | 34773216944 |
18 | 173737947911 |
19 | 871442154413 |
20 | 4386482848975 |
21 | 22150822685669 |
22 | 112185906664804 |
23 | 569713055956736 |
24 | 2900350345874632 |
25 | 14799219791196091 |
[1,4,15,62,263,1153,5187,23792,110898,523773, 2501268,12057407,58593831,286743949,1411905287, 6989973590,34773216944,173737947911,871442154413, 4386482848975,22150822685669,112185906664804, 569713055956736,2900350345874632, 14799219791196091] |