n | a(n) |
---|---|
2 | 1 |
3 | 9 |
4 | 59 |
5 | 346 |
6 | 1931 |
7 | 10513 |
8 | 56478 |
9 | 301128 |
10 | 1598424 |
11 | 8461783 |
12 | 44720274 |
13 | 236094725 |
14 | 1245579365 |
15 | 6568448233 |
16 | 34627898410 |
17 | 182517293169 |
18 | 961887614156 |
19 | 5068804722664 |
20 | 26709150033769 |
21 | 140733080850141 |
22 | 741514434266253 |
[1,9,59,346,1931,10513,56478,301128,1598424, 8461783,44720274,236094725,1245579365,6568448233, 34627898410,182517293169,961887614156, 5068804722664,26709150033769,140733080850141, 741514434266253] |