n | a(n) |
---|---|
2 | 1 |
3 | 32 |
4 | 321 |
5 | 2560 |
6 | 18881 |
7 | 135072 |
8 | 954241 |
9 | 6705920 |
10 | 47020161 |
11 | 329377312 |
12 | 2306349761 |
13 | 16146574080 |
14 | 113032395841 |
15 | 791245902752 |
16 | 5538778714881 |
17 | 38771623191040 |
18 | 271401878897921 |
19 | 1899814701967392 |
20 | 13298707562817601 |
21 | 93090966886860800 |
22 | 651636810049438401 |
[1,32,321,2560,18881,135072,954241,6705920, 47020161,329377312,2306349761,16146574080, 113032395841,791245902752,5538778714881, 38771623191040,271401878897921,1899814701967392, 13298707562817601,93090966886860800, 651636810049438401] |