n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 3 |
3 | 13 |
4 | 74 |
5 | 556 |
6 | 5369 |
7 | 64000 |
8 | 917235 |
9 | 15450781 |
10 | 300882997 |
11 | 6682784998 |
12 | 167423745058 |
13 | 4687321410460 |
14 | 145487540598936 |
15 | 4972006889998672 |
16 | 185965612590706251 |
17 | 7572297055379416985 |
18 | 334097417273761302271 |
19 | 15905277840810391655517 |
20 | 813931037149014145154401 |
[1,1,3,13,74,556,5369,64000,917235,15450781, 300882997,6682784998,167423745058,4687321410460, 145487540598936,4972006889998672, 185965612590706251,7572297055379416985, 334097417273761302271,15905277840810391655517, 813931037149014145154401] |