n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 2 |
3 | 4 |
4 | 34 |
5 | 196 |
6 | 1826 |
7 | 17172 |
8 | 199074 |
9 | 2510116 |
10 | 35862562 |
11 | 559572916 |
12 | 9577862306 |
13 | 177417693636 |
14 | 3546104002338 |
15 | 75961485384532 |
16 | 1737273637523362 |
17 | 42235881659123812 |
18 | 1087865420946370082 |
19 | 29589907884231535860 |
20 | 847576876148087333538 |
21 | 25501591020532799366404 |
[1,0,2,4,34,196,1826,17172,199074,2510116, 35862562,559572916,9577862306,177417693636, 3546104002338,75961485384532,1737273637523362, 42235881659123812,1087865420946370082, 29589907884231535860,847576876148087333538, 25501591020532799366404] |