n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 2 |
3 | 6 |
4 | 12 |
5 | 30 |
6 | 60 |
7 | 140 |
8 | 280 |
9 | 630 |
10 | 1260 |
11 | 2772 |
12 | 5544 |
13 | 12012 |
14 | 24024 |
15 | 51480 |
16 | 102960 |
17 | 218790 |
18 | 437580 |
19 | 923780 |
20 | 1847560 |
21 | 3879876 |
22 | 7759752 |
23 | 16224936 |
24 | 32449872 |
25 | 67603900 |
26 | 135207800 |
27 | 280816200 |
28 | 561632400 |
29 | 1163381400 |
30 | 2326762800 |
[0,1,2,6,12,30,60,140,280,630,1260,2772,5544, 12012,24024,51480,102960,218790,437580,923780, 1847560,3879876,7759752,16224936,32449872, 67603900,135207800,280816200,561632400,1163381400, 2326762800] |