n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | 3 |
4 | 17 |
5 | 104 |
6 | 915 |
7 | 8618 |
8 | 104436 |
9 | 1337282 |
10 | 20709209 |
11 | 336013996 |
12 | 6343919118 |
13 | 124736306407 |
14 | 2780356513594 |
15 | 64249797198125 |
16 | 1651884203936474 |
17 | 43874277964032394 |
18 | 1278413274487999471 |
19 | 38372024627757454128 |
20 | 1249821733374560346851 |
21 | 41835183404896657899658 |
[1,1,1,3,17,104,915,8618,104436,1337282,20709209, 336013996,6343919118,124736306407,2780356513594, 64249797198125,1651884203936474,43874277964032394, 1278413274487999471,38372024627757454128, 1249821733374560346851,41835183404896657899658] |