n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 1 |
3 | 1 |
4 | 5 |
5 | 16 |
6 | 75 |
7 | 366 |
8 | 2016 |
9 | 11936 |
10 | 75678 |
11 | 507575 |
12 | 3575693 |
13 | 26289408 |
14 | 200709665 |
15 | 1584482382 |
16 | 12888498820 |
17 | 107698656192 |
18 | 922140333952 |
19 | 8072379904752 |
20 | 72108967554160 |
21 | 656190909218560 |
22 | 6074106708205200 |
23 | 57118680813847840 |
[1,0,1,1,5,16,75,366,2016,11936,75678,507575, 3575693,26289408,200709665,1584482382,12888498820, 107698656192,922140333952,8072379904752, 72108967554160,656190909218560,6074106708205200, 57118680813847840] |