n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 1 |
3 | 1 |
4 | 3 |
5 | 11 |
6 | 40 |
7 | 232 |
8 | 1246 |
9 | 8912 |
10 | 65766 |
11 | 561001 |
12 | 5198424 |
13 | 52513111 |
14 | 577791292 |
15 | 6806860347 |
16 | 86303601008 |
17 | 1163845620633 |
18 | 16701819148776 |
19 | 253608108810052 |
20 | 4065574363467636 |
21 | 68608467057149112 |
22 | 1215544196988580438 |
23 | 22564088376584800717 |
[0,0,1,1,3,11,40,232,1246,8912,65766,561001, 5198424,52513111,577791292,6806860347,86303601008, 1163845620633,16701819148776,253608108810052, 4065574363467636,68608467057149112, 1215544196988580438,22564088376584800717] |