n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 3 |
3 | 18 |
4 | 162 |
5 | 1851 |
6 | 24661 |
7 | 365613 |
8 | 5863881 |
9 | 99895425 |
10 | 1785024645 |
11 | 33156724734 |
12 | 635961987570 |
13 | 12531882072719 |
14 | 252701147866029 |
15 | 5198011293931270 |
16 | 108793300411597194 |
17 | 2312049376195527621 |
18 | 49804793378882733343 |
19 | 1085910951385068915212 |
20 | 23934948368968158240960 |
[1,1,3,18,162,1851,24661,365613,5863881,99895425, 1785024645,33156724734,635961987570, 12531882072719,252701147866029,5198011293931270, 108793300411597194,2312049376195527621, 49804793378882733343,1085910951385068915212, 23934948368968158240960] |