n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 6 |
4 | 12 |
5 | 84 |
6 | 252 |
7 | 252 |
8 | 504 |
9 | 2520 |
10 | 17640 |
11 | 52920 |
12 | 52920 |
13 | 52920 |
14 | 52920 |
15 | 476280 |
16 | 952560 |
17 | 952560 |
18 | 4762800 |
19 | 61916400 |
20 | 185749200 |
21 | 928746000 |
22 | 928746000 |
23 | 928746000 |
24 | 928746000 |
25 | 4643730000 |
26 | 13931190000 |
27 | 13931190000 |
28 | 13931190000 |
29 | 13931190000 |
[1,1,2,6,12,84,252,252,504,2520,17640,52920,52920, 52920,52920,476280,952560,952560,4762800,61916400, 185749200,928746000,928746000,928746000,928746000, 4643730000,13931190000,13931190000,13931190000, 13931190000] |