n | a(n) |
---|---|
0 | 1 |
1 | 63 |
2 | 1260 |
3 | 13860 |
4 | 103950 |
5 | 594594 |
6 | 2774772 |
7 | 11042460 |
8 | 38648610 |
9 | 121671550 |
10 | 350414064 |
11 | 935402832 |
12 | 2338507080 |
13 | 5521090680 |
14 | 12394285200 |
15 | 26606398896 |
16 | 54875697723 |
17 | 109181751525 |
18 | 210275965900 |
19 | 393175282500 |
20 | 715579014150 |
21 | 1270517841450 |
22 | 2205030964500 |
23 | 3747302149500 |
[1,63,1260,13860,103950,594594,2774772,11042460, 38648610,121671550,350414064,935402832,2338507080, 5521090680,12394285200,26606398896,54875697723, 109181751525,210275965900,393175282500, 715579014150,1270517841450,2205030964500, 3747302149500] |