n | a(n) |
---|---|
3 | 1 |
4 | 1 |
5 | 5 |
6 | 20 |
7 | 117 |
8 | 791 |
9 | 6205 |
10 | 55004 |
11 | 543597 |
12 | 5922929 |
13 | 70518905 |
14 | 910711192 |
15 | 12678337945 |
16 | 189252400479 |
17 | 3015217932073 |
18 | 51067619064872 |
19 | 916176426422089 |
20 | 17355904144773969 |
21 | 346195850534379613 |
22 | 7252654441500887308 |
23 | 159210363453697619309 |
24 | 3654550890669678498263 |
[1,1,5,20,117,791,6205,55004,543597,5922929, 70518905,910711192,12678337945,189252400479, 3015217932073,51067619064872,916176426422089, 17355904144773969,346195850534379613, 7252654441500887308,159210363453697619309, 3654550890669678498263] |