n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 4 |
4 | 15 |
5 | 96 |
6 | 455 |
7 | 4320 |
8 | 29295 |
9 | 300160 |
10 | 2663199 |
11 | 36288000 |
12 | 348523175 |
13 | 5748019200 |
14 | 68027248575 |
15 | 1116542242816 |
16 | 16813959537375 |
17 | 334764638208000 |
18 | 4954072089341375 |
19 | 115242726703104000 |
20 | 1966765155600364119 |
21 | 45415699475660800000 |
22 | 930312555383281809375 |
[1,1,4,15,96,455,4320,29295,300160,2663199, 36288000,348523175,5748019200,68027248575, 1116542242816,16813959537375,334764638208000, 4954072089341375,115242726703104000, 1966765155600364119,45415699475660800000, 930312555383281809375] |