n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 6 |
4 | 40 |
5 | 472 |
6 | 10668 |
7 | 450924 |
8 | 35863972 |
9 | 5353011036 |
10 | 1500957422222 |
11 | 790347882174804 |
12 | 781621363452405930 |
13 | 1451740730942350766748 |
14 | 5064070747064013556294032 |
15 | 33176273260130056822126522884 |
16 | 408199838581532754602910469192704 |
[1,1,2,6,40,472,10668,450924,35863972,5353011036, 1500957422222,790347882174804,781621363452405930, 1451740730942350766748,5064070747064013556294032, 33176273260130056822126522884, 408199838581532754602910469192704] |