n | a(n) |
---|---|
1 | 0 |
2 | 0 |
3 | 0 |
4 | 105 |
5 | 109781 |
6 | 12597900 |
7 | 302280963 |
8 | 3356773532 |
9 | 23599355991 |
10 | 122416062018 |
11 | 510681301550 |
12 | 1807308075111 |
13 | 5622246678741 |
14 | 15761274284852 |
15 | 40547443860105 |
16 | 97044388890450 |
17 | 218379097055159 |
18 | 465931135430250 |
19 | 948922558475388 |
20 | 1854955331788517 |
21 | 3496355565562725 |
[0,0,0,105,109781,12597900,302280963,3356773532, 23599355991,122416062018,510681301550, 1807308075111,5622246678741,15761274284852, 40547443860105,97044388890450,218379097055159, 465931135430250,948922558475388,1854955331788517, 3496355565562725] |