n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 3 |
4 | 16 |
5 | 122 |
6 | 1203 |
7 | 14518 |
8 | 207061 |
9 | 3406083 |
10 | 63465271 |
11 | 1320938774 |
12 | 30371545338 |
13 | 764447981599 |
14 | 20904838435264 |
15 | 617151430504113 |
16 | 19561785238965715 |
17 | 662583041367287249 |
18 | 23882958184429006800 |
19 | 912777131398463190802 |
20 | 36868849734952579404745 |
[1,1,3,16,122,1203,14518,207061,3406083,63465271, 1320938774,30371545338,764447981599, 20904838435264,617151430504113,19561785238965715, 662583041367287249,23882958184429006800, 912777131398463190802,36868849734952579404745] |