n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 8 |
4 | 42 |
5 | 273 |
6 | 1970 |
7 | 15368 |
8 | 126510 |
9 | 1086546 |
10 | 9652364 |
11 | 88172609 |
12 | 824506191 |
13 | 7865294687 |
14 | 76331857094 |
15 | 751981532942 |
16 | 7506432993145 |
17 | 75811326673326 |
18 | 773682540353704 |
19 | 7969986193751019 |
20 | 82798726340037900 |
21 | 866804540900696571 |
[1,1,2,8,42,273,1970,15368,126510,1086546,9652364, 88172609,824506191,7865294687,76331857094, 751981532942,7506432993145,75811326673326, 773682540353704,7969986193751019, 82798726340037900,866804540900696571] |