n | a(n) |
---|---|
2 | 1 |
3 | 9 |
4 | 86 |
5 | 950 |
6 | 12139 |
7 | 177331 |
8 | 2924172 |
9 | 53809164 |
10 | 1094071221 |
11 | 24372200061 |
12 | 590546123298 |
13 | 15467069396610 |
14 | 435512515705695 |
15 | 13121113142970855 |
16 | 421214220916438680 |
17 | 14354510691610713240 |
18 | 517596339235489288425 |
19 | 19688993487602867898225 |
20 | 787995759739909824183150 |
[1,9,86,950,12139,177331,2924172,53809164, 1094071221,24372200061,590546123298, 15467069396610,435512515705695,13121113142970855, 421214220916438680,14354510691610713240, 517596339235489288425,19688993487602867898225, 787995759739909824183150] |