n | a(n) |
---|---|
5 | 1 |
6 | 15 |
7 | 210 |
8 | 3220 |
9 | 55755 |
10 | 1092105 |
11 | 24048255 |
12 | 590412240 |
13 | 16027796070 |
14 | 477411574640 |
15 | 15495339234375 |
16 | 544652100894720 |
17 | 20619226977792170 |
18 | 836670560604157440 |
19 | 36232055577668433690 |
20 | 1668081561600000000000 |
21 | 81363801140161673297535 |
22 | 4191692026268767965880320 |
[1,15,210,3220,55755,1092105,24048255,590412240, 16027796070,477411574640,15495339234375, 544652100894720,20619226977792170, 836670560604157440,36232055577668433690, 1668081561600000000000,81363801140161673297535, 4191692026268767965880320] |