n | a(n) |
---|---|
1 | 0 |
2 | 0 |
3 | 17 |
4 | 191 |
5 | 1816 |
6 | 16541 |
7 | 149320 |
8 | 1344880 |
9 | 12106148 |
10 | 108960347 |
11 | 980654368 |
12 | 8825914594 |
13 | 79433288194 |
14 | 714899721602 |
15 | 6434097782077 |
16 | 57906880685893 |
17 | 521161927629204 |
18 | 4690457351939133 |
19 | 42214116174823814 |
20 | 379927045590000351 |
21 | 3419343410347321718 |
[0,0,17,191,1816,16541,149320,1344880,12106148, 108960347,980654368,8825914594,79433288194, 714899721602,6434097782077,57906880685893, 521161927629204,4690457351939133, 42214116174823814,379927045590000351, 3419343410347321718] |