n | a(n) |
---|---|
1 | 0 |
2 | 1 |
3 | 18 |
4 | 756 |
5 | 18478 |
6 | 327338 |
7 | 4292145 |
8 | 43576141 |
9 | 354466005 |
10 | 2394458182 |
11 | 13770292261 |
12 | 69111228938 |
13 | 307750080438 |
14 | 1236998118274 |
15 | 4537247867399 |
16 | 15375840213938 |
17 | 48489022864504 |
18 | 143625325278096 |
19 | 401488209736317 |
[0,1,18,756,18478,327338,4292145,43576141, 354466005,2394458182,13770292261,69111228938, 307750080438,1236998118274,4537247867399, 15375840213938,48489022864504,143625325278096, 401488209736317] |