n | a(n) |
---|---|
1 | 1 |
2 | 0 |
3 | 1 |
4 | 4 |
5 | 21 |
6 | 246 |
7 | 1863 |
8 | 23136 |
9 | 229393 |
10 | 3180130 |
11 | 38913843 |
12 | 608072752 |
13 | 8844663985 |
14 | 155109521308 |
15 | 2613015969021 |
16 | 51036424274176 |
17 | 976918853998225 |
18 | 21082345113201546 |
19 | 451853400885507387 |
20 | 10694551206254213904 |
21 | 253681850521817495793 |
22 | 6541364948743776227428 |
[1,0,1,4,21,246,1863,23136,229393,3180130, 38913843,608072752,8844663985,155109521308, 2613015969021,51036424274176,976918853998225, 21082345113201546,451853400885507387, 10694551206254213904,253681850521817495793, 6541364948743776227428] |