n | a(n) |
---|---|
4 | 1 |
5 | 10 |
6 | 105 |
7 | 1295 |
8 | 18865 |
9 | 320544 |
10 | 6258000 |
11 | 138437310 |
12 | 3428282880 |
13 | 94059655690 |
14 | 2833936641536 |
15 | 93055995703125 |
16 | 3308477732618240 |
17 | 126642365068676240 |
18 | 5193315990469140480 |
19 | 227160198500847385884 |
20 | 10557603840000000000000 |
21 | 519578655591970045435770 |
[1,10,105,1295,18865,320544,6258000,138437310, 3428282880,94059655690,2833936641536, 93055995703125,3308477732618240, 126642365068676240,5193315990469140480, 227160198500847385884,10557603840000000000000, 519578655591970045435770] |