n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 5 |
3 | 10 |
4 | 53 |
5 | 126 |
6 | 662 |
7 | 1716 |
8 | 8885 |
9 | 24310 |
10 | 124130 |
11 | 352716 |
12 | 1778966 |
13 | 5200300 |
14 | 25947612 |
15 | 77558760 |
16 | 383358645 |
17 | 1166803110 |
18 | 5719519850 |
19 | 17672631900 |
20 | 85990654178 |
21 | 269128937220 |
22 | 1300866635172 |
23 | 4116715363800 |
24 | 19780031677718 |
25 | 63205303218876 |
26 | 302045506654052 |
[1,1,5,10,53,126,662,1716,8885,24310,124130, 352716,1778966,5200300,25947612,77558760, 383358645,1166803110,5719519850,17672631900, 85990654178,269128937220,1300866635172, 4116715363800,19780031677718,63205303218876, 302045506654052] |