n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 3 |
3 | 13 |
4 | 69 |
5 | 421 |
6 | 2867 |
7 | 21477 |
8 | 175769 |
9 | 1567273 |
10 | 15213955 |
11 | 160727997 |
12 | 1846282381 |
13 | 23013527421 |
14 | 310284575683 |
15 | 4506744095141 |
16 | 70199956070705 |
17 | 1167389338452753 |
18 | 20636801363971139 |
19 | 386304535988493101 |
20 | 7630926750477398037 |
21 | 158584458024427667669 |
[1,1,3,13,69,421,2867,21477,175769,1567273, 15213955,160727997,1846282381,23013527421, 310284575683,4506744095141,70199956070705, 1167389338452753,20636801363971139, 386304535988493101,7630926750477398037, 158584458024427667669] |