n | a(n) |
---|---|
1 | 5 |
2 | 25 |
3 | 120 |
4 | 570 |
5 | 2670 |
6 | 12380 |
7 | 56890 |
8 | 259445 |
9 | 1175355 |
10 | 5293671 |
11 | 23718780 |
12 | 105781845 |
13 | 469798125 |
14 | 2078552055 |
15 | 9164402118 |
16 | 40277785365 |
17 | 176503698495 |
18 | 771372344695 |
19 | 3362640467600 |
20 | 14624384170213 |
21 | 63463229049585 |
22 | 274836205944615 |
[5,25,120,570,2670,12380,56890,259445,1175355, 5293671,23718780,105781845,469798125,2078552055, 9164402118,40277785365,176503698495,771372344695, 3362640467600,14624384170213,63463229049585, 274836205944615] |