n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 331 |
3 | 8401 |
4 | 80581 |
5 | 464881 |
6 | 1950271 |
7 | 6568801 |
8 | 18837001 |
9 | 47763361 |
10 | 109889011 |
11 | 233669041 |
12 | 465542221 |
13 | 878077201 |
14 | 1580623591 |
15 | 2732936641 |
16 | 4562284561 |
17 | 7384587841 |
18 | 11630180251 |
19 | 17874821521 |
20 | 26876632021 |
21 | 39619660081 |
22 | 57364832911 |
[1,1,331,8401,80581,464881,1950271,6568801, 18837001,47763361,109889011,233669041,465542221, 878077201,1580623591,2732936641,4562284561, 7384587841,11630180251,17874821521,26876632021, 39619660081,57364832911] |