n | a(n) |
---|---|
0 | 1 |
1 | 18 |
2 | 209 |
3 | 1998 |
4 | 17157 |
5 | 137970 |
6 | 1063273 |
7 | 7962966 |
8 | 58471853 |
9 | 423482202 |
10 | 3037367697 |
11 | 21634921854 |
12 | 153344743189 |
13 | 1083048862914 |
14 | 7630057197881 |
15 | 53656123623462 |
16 | 376830071424765 |
17 | 2644030889883306 |
18 | 18539455617424225 |
[1,18,209,1998,17157,137970,1063273,7962966, 58471853,423482202,3037367697,21634921854, 153344743189,1083048862914,7630057197881, 53656123623462,376830071424765,2644030889883306, 18539455617424225] |