n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 18 |
3 | 260 |
4 | 5250 |
5 | 136332 |
6 | 4327092 |
7 | 162309576 |
8 | 7024896450 |
9 | 344582629820 |
10 | 18890850749628 |
11 | 1144656941236536 |
12 | 75963981061424820 |
13 | 5479642938171428600 |
14 | 426894499408073653800 |
15 | 35720957482170932284560 |
16 | 3195135789350678836128450 |
17 | 304234032845362459798904220 |
[1,2,18,260,5250,136332,4327092,162309576, 7024896450,344582629820,18890850749628, 1144656941236536,75963981061424820, 5479642938171428600,426894499408073653800, 35720957482170932284560,3195135789350678836128450, 304234032845362459798904220] |