n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 3 |
3 | 10 |
4 | 53 |
5 | 376 |
6 | 3607 |
7 | 38032 |
8 | 498409 |
9 | 7122304 |
10 | 121691051 |
11 | 2182921984 |
12 | 45592175389 |
13 | 987527547904 |
14 | 24479592884671 |
15 | 620921169012736 |
16 | 17795726532904913 |
17 | 517636848366223360 |
18 | 16851227968120051027 |
19 | 552890360903850459136 |
20 | 20150074601540899828741 |
[1,1,3,10,53,376,3607,38032,498409,7122304, 121691051,2182921984,45592175389,987527547904, 24479592884671,620921169012736,17795726532904913, 517636848366223360,16851227968120051027, 552890360903850459136,20150074601540899828741] |