n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 3 |
4 | 8 |
5 | 22 |
6 | 58 |
7 | 160 |
8 | 434 |
9 | 1204 |
10 | 3341 |
11 | 9363 |
12 | 26308 |
13 | 74376 |
14 | 210823 |
15 | 599832 |
16 | 1710803 |
17 | 4891876 |
18 | 14015505 |
19 | 40231632 |
20 | 115669419 |
21 | 333052242 |
22 | 960219982 |
23 | 2771707332 |
24 | 8009222307 |
25 | 23166563032 |
26 | 67069289457 |
27 | 194332834601 |
[1,1,3,8,22,58,160,434,1204,3341,9363,26308,74376, 210823,599832,1710803,4891876,14015505,40231632, 115669419,333052242,960219982,2771707332, 8009222307,23166563032,67069289457,194332834601] |