n | a(n) |
---|---|
1 | 0 |
2 | 1 |
3 | 6 |
4 | 44 |
5 | 430 |
6 | 5322 |
7 | 79184 |
8 | 1381144 |
9 | 27730602 |
10 | 630422390 |
11 | 16006336852 |
12 | 448982630340 |
13 | 13792542282974 |
14 | 460632431511826 |
15 | 16620059192605080 |
16 | 644338908974954672 |
17 | 26713929408696716242 |
18 | 1179487563859389821166 |
[0,1,6,44,430,5322,79184,1381144,27730602, 630422390,16006336852,448982630340,13792542282974, 460632431511826,16620059192605080, 644338908974954672,26713929408696716242, 1179487563859389821166] |