n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 3 |
3 | 12 |
4 | 61 |
5 | 380 |
6 | 2783 |
7 | 23240 |
8 | 217817 |
9 | 2267472 |
10 | 25924827 |
11 | 322257408 |
12 | 4325450325 |
13 | 62374428480 |
14 | 961296291447 |
15 | 15754664717184 |
16 | 273537984529713 |
17 | 5016337928401152 |
18 | 96871316157146163 |
19 | 1964030207217042432 |
20 | 41706446669511523821 |
21 | 925774982414999202816 |
[1,1,3,12,61,380,2783,23240,217817,2267472, 25924827,322257408,4325450325,62374428480, 961296291447,15754664717184,273537984529713, 5016337928401152,96871316157146163, 1964030207217042432,41706446669511523821, 925774982414999202816] |