n | a(n) |
---|---|
0 | 1 |
1 | 6 |
2 | 44 |
3 | 426 |
4 | 4658 |
5 | 55260 |
6 | 689508 |
7 | 8914872 |
8 | 118374410 |
9 | 1604658420 |
10 | 22115171280 |
11 | 308940507202 |
12 | 4364729023812 |
13 | 62256518307724 |
14 | 895294865045296 |
15 | 12966655239260890 |
16 | 188967013096930258 |
17 | 2769003814616561636 |
18 | 40773380119956434784 |
19 | 603008173331642200144 |
[1,6,44,426,4658,55260,689508,8914872,118374410, 1604658420,22115171280,308940507202,4364729023812, 62256518307724,895294865045296,12966655239260890, 188967013096930258,2769003814616561636, 40773380119956434784,603008173331642200144] |