n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 6 |
3 | 28 |
4 | 188 |
5 | 1656 |
6 | 17992 |
7 | 232016 |
8 | 3460368 |
9 | 58574368 |
10 | 1109200736 |
11 | 23230928832 |
12 | 533139875776 |
13 | 13304094478208 |
14 | 358653008619648 |
15 | 10387075613199616 |
16 | 321626829363798272 |
17 | 10602925778746753536 |
18 | 370770015836513986048 |
[1,2,6,28,188,1656,17992,232016,3460368,58574368, 1109200736,23230928832,533139875776, 13304094478208,358653008619648,10387075613199616, 321626829363798272,10602925778746753536, 370770015836513986048] |