n | a(n) |
---|---|
0 | 1 |
1 | 12 |
2 | 84 |
3 | 558 |
4 | 3696 |
5 | 24582 |
6 | 164304 |
7 | 1103478 |
8 | 7444416 |
9 | 50431302 |
10 | 342941424 |
11 | 2340123798 |
12 | 16018069536 |
13 | 109949704422 |
14 | 756587236944 |
15 | 5217746494518 |
16 | 36054040477056 |
17 | 249557173431942 |
18 | 1729973554578864 |
19 | 12008254925383638 |
[1,12,84,558,3696,24582,164304,1103478,7444416, 50431302,342941424,2340123798,16018069536, 109949704422,756587236944,5217746494518, 36054040477056,249557173431942,1729973554578864, 12008254925383638] |