n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 2 |
3 | 18 |
4 | 158 |
5 | 1530 |
6 | 16622 |
7 | 201978 |
8 | 2724878 |
9 | 40492890 |
10 | 657944942 |
11 | 11611834938 |
12 | 221291822798 |
13 | 4530383962650 |
14 | 99179581033262 |
15 | 2312402554523898 |
16 | 57211901491595918 |
17 | 1497211181084718810 |
[0,0,2,18,158,1530,16622,201978,2724878,40492890, 657944942,11611834938,221291822798,4530383962650, 99179581033262,2312402554523898,57211901491595918, 1497211181084718810] |