n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 1 |
3 | 3 |
4 | 26 |
5 | 230 |
6 | 2794 |
7 | 39564 |
8 | 663606 |
9 | 12712104 |
10 | 275171106 |
11 | 6632699040 |
12 | 176309074644 |
13 | 5123121177096 |
14 | 161577261004860 |
15 | 5497133655605760 |
16 | 200683752698028924 |
17 | 7825434930630743616 |
18 | 324616635150708044796 |
19 | 14273994548639305751040 |
20 | 663205761925601097418488 |
[1,0,1,3,26,230,2794,39564,663606,12712104, 275171106,6632699040,176309074644,5123121177096, 161577261004860,5497133655605760, 200683752698028924,7825434930630743616, 324616635150708044796,14273994548639305751040, 663205761925601097418488] |