n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 6 |
4 | 24 |
5 | 120 |
6 | 720 |
7 | 4320 |
8 | 30960 |
9 | 256320 |
10 | 2399760 |
11 | 25022880 |
12 | 287250480 |
13 | 3284869680 |
14 | 41344521840 |
15 | 566715682800 |
16 | 8391341277360 |
17 | 133348995238320 |
18 | 2262083352430320 |
19 | 38232720235613520 |
20 | 689864650481977200 |
21 | 13221780471876281040 |
22 | 268029961230742291440 |
[1,1,2,6,24,120,720,4320,30960,256320,2399760, 25022880,287250480,3284869680,41344521840, 566715682800,8391341277360,133348995238320, 2262083352430320,38232720235613520, 689864650481977200,13221780471876281040, 268029961230742291440] |