n | a(n) |
---|---|
0 | 1 |
1 | 240 |
2 | 9120 |
3 | 121680 |
4 | 864960 |
5 | 4113840 |
6 | 14905440 |
7 | 44480400 |
8 | 114879360 |
9 | 265422960 |
10 | 561403680 |
11 | 1105317840 |
12 | 2050966080 |
13 | 3620750640 |
14 | 6126497760 |
15 | 9994133520 |
16 | 15792541440 |
17 | 24266930160 |
18 | 36377039520 |
19 | 53340513360 |
20 | 76681767360 |
[1,240,9120,121680,864960,4113840,14905440, 44480400,114879360,265422960,561403680,1105317840, 2050966080,3620750640,6126497760,9994133520, 15792541440,24266930160,36377039520,53340513360, 76681767360] |