n | a(n) |
---|---|
1 | 5 |
2 | 20 |
3 | 70 |
4 | 350 |
5 | 820 |
6 | 8030 |
7 | 13170 |
8 | 102750 |
9 | 327050 |
10 | 2444780 |
11 | 4884430 |
12 | 61632150 |
13 | 101732420 |
14 | 1017309930 |
15 | 3816214730 |
16 | 19104506250 |
17 | 47683838320 |
18 | 635787430450 |
19 | 1059638680670 |
20 | 11924777944650 |
21 | 39736963208630 |
[5,20,70,350,820,8030,13170,102750,327050,2444780, 4884430,61632150,101732420,1017309930,3816214730, 19104506250,47683838320,635787430450, 1059638680670,11924777944650,39736963208630] |