n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 20 |
3 | 276 |
4 | 4544 |
5 | 84496 |
6 | 1723960 |
7 | 37906608 |
8 | 887437120 |
9 | 21930970336 |
10 | 568496401152 |
11 | 15384167213056 |
12 | 433012038646112 |
13 | 12640210696664768 |
14 | 381804410640552576 |
15 | 11911194405763099520 |
16 | 383211218811649633792 |
17 | 12698182733530048241152 |
[1,2,20,276,4544,84496,1723960,37906608,887437120, 21930970336,568496401152,15384167213056, 433012038646112,12640210696664768, 381804410640552576,11911194405763099520, 383211218811649633792,12698182733530048241152] |