n | a(n) |
---|---|
0 | 1 |
1 | 5 |
2 | 30 |
3 | 155 |
4 | 805 |
5 | 4055 |
6 | 20455 |
7 | 102455 |
8 | 513230 |
9 | 2567230 |
10 | 12841130 |
11 | 64211380 |
12 | 321082905 |
13 | 1605444405 |
14 | 8027354055 |
15 | 40136925680 |
16 | 200685295955 |
17 | 1003427268205 |
18 | 5017139711105 |
19 | 25085702537730 |
20 | 125428529603755 |
21 | 627142668099880 |
22 | 3135713425289030 |
23 | 15678567227192655 |
[1,5,30,155,805,4055,20455,102455,513230,2567230, 12841130,64211380,321082905,1605444405,8027354055, 40136925680,200685295955,1003427268205, 5017139711105,25085702537730,125428529603755, 627142668099880,3135713425289030, 15678567227192655] |