n | a(n) |
---|---|
3 | 6 |
4 | 138 |
5 | 1452 |
6 | 11444 |
7 | 78642 |
8 | 502846 |
9 | 3089624 |
10 | 18559208 |
11 | 110049502 |
12 | 647720562 |
13 | 3796113284 |
14 | 22194147996 |
15 | 129581349642 |
16 | 755982695718 |
17 | 4408534120368 |
18 | 25702339082192 |
19 | 149828229039030 |
20 | 873339353640538 |
21 | 5090437245730652 |
[6,138,1452,11444,78642,502846,3089624,18559208, 110049502,647720562,3796113284,22194147996, 129581349642,755982695718,4408534120368, 25702339082192,149828229039030,873339353640538, 5090437245730652] |