n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 3 |
3 | 9 |
4 | 33 |
5 | 137 |
6 | 635 |
7 | 3233 |
8 | 17881 |
9 | 106489 |
10 | 678091 |
11 | 4590225 |
12 | 32873625 |
13 | 248056497 |
14 | 1965232403 |
15 | 16297012121 |
16 | 141080069057 |
17 | 1271902272241 |
18 | 11916559511731 |
19 | 115805756278393 |
20 | 1165319447579313 |
21 | 12123219789825273 |
22 | 130206136096941195 |
[1,1,3,9,33,137,635,3233,17881,106489,678091, 4590225,32873625,248056497,1965232403,16297012121, 141080069057,1271902272241,11916559511731, 115805756278393,1165319447579313, 12123219789825273,130206136096941195] |