n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 1 |
3 | 3 |
4 | 17 |
5 | 110 |
6 | 874 |
7 | 8064 |
8 | 85182 |
9 | 1012248 |
10 | 13369026 |
11 | 194245590 |
12 | 3079135806 |
13 | 52880064588 |
14 | 978038495316 |
15 | 19381794788160 |
16 | 409702099828104 |
17 | 9201877089355584 |
18 | 218832476773294008 |
19 | 5493266481129425064 |
20 | 145153549897858762776 |
21 | 4027310838211114515600 |
[1,0,1,3,17,110,874,8064,85182,1012248,13369026, 194245590,3079135806,52880064588,978038495316, 19381794788160,409702099828104,9201877089355584, 218832476773294008,5493266481129425064, 145153549897858762776,4027310838211114515600] |