n | a(n) |
---|---|
0 | 1 |
1 | 18 |
2 | 207 |
3 | 1842 |
4 | 13869 |
5 | 92250 |
6 | 557214 |
7 | 3111624 |
8 | 16272972 |
9 | 80461694 |
10 | 378917667 |
11 | 1709416008 |
12 | 7422200694 |
13 | 31136646366 |
14 | 126608628735 |
15 | 500368588830 |
16 | 1926482319873 |
17 | 7240422289338 |
18 | 26610335585263 |
[1,18,207,1842,13869,92250,557214,3111624, 16272972,80461694,378917667,1709416008,7422200694, 31136646366,126608628735,500368588830, 1926482319873,7240422289338,26610335585263] |