n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 11 |
3 | 110 |
4 | 1154 |
5 | 13144 |
6 | 164136 |
7 | 2251920 |
8 | 33923760 |
9 | 560180160 |
10 | 10117886400 |
11 | 199399132800 |
12 | 4275988617600 |
13 | 99473802624000 |
14 | 2502049379558400 |
15 | 67804022648678400 |
16 | 1972357507107993600 |
17 | 61358018782620672000 |
18 | 2033893411878730752000 |
19 | 71587670846333773824000 |
20 | 2666700362750370895872000 |
[0,1,11,110,1154,13144,164136,2251920,33923760, 560180160,10117886400,199399132800,4275988617600, 99473802624000,2502049379558400,67804022648678400, 1972357507107993600,61358018782620672000, 2033893411878730752000,71587670846333773824000, 2666700362750370895872000] |