n | a(n) |
---|---|
1 | 1 |
2 | 4 |
3 | 22 |
4 | 135 |
5 | 905 |
6 | 64662 |
7 | 4849682 |
8 | 377197536 |
9 | 30175802922 |
10 | 2468929330031 |
11 | 205744110835938 |
12 | 17409117070733232 |
13 | 1492210034634277058 |
14 | 129324869668304011738 |
15 | 11315926095976601027106 |
16 | 998464067292053031803477 |
17 | 88752361537071380604753549 |
18 | 7941000769106386685688475516 |
[1,4,22,135,905,64662,4849682,377197536, 30175802922,2468929330031,205744110835938, 17409117070733232,1492210034634277058, 129324869668304011738,11315926095976601027106, 998464067292053031803477, 88752361537071380604753549, 7941000769106386685688475516] |