n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 7 |
3 | 55 |
4 | 571 |
5 | 6991 |
6 | 101467 |
7 | 1682815 |
8 | 31370731 |
9 | 648823951 |
10 | 14728727227 |
11 | 363609116575 |
12 | 9692252794891 |
13 | 277304683729711 |
14 | 8471938268282587 |
15 | 275137855204310335 |
16 | 9461893931226763051 |
17 | 343394421233354232271 |
18 | 13112532730352768439547 |
19 | 525396814643685317840095 |
[1,1,7,55,571,6991,101467,1682815,31370731, 648823951,14728727227,363609116575,9692252794891, 277304683729711,8471938268282587, 275137855204310335,9461893931226763051, 343394421233354232271,13112532730352768439547, 525396814643685317840095] |