n | a(n) |
---|---|
1 | 1 |
2 | 9 |
3 | 56 |
4 | 219 |
5 | 630 |
6 | 2016 |
7 | 4472 |
8 | 12285 |
9 | 25738 |
10 | 62370 |
11 | 118548 |
12 | 294336 |
13 | 512134 |
14 | 1167192 |
15 | 2152080 |
16 | 4620147 |
17 | 7847658 |
18 | 17604792 |
19 | 28681660 |
20 | 62224470 |
21 | 105431872 |
22 | 212319468 |
23 | 348698376 |
24 | 759507840 |
25 | 1181718775 |
26 | 2401396326 |
27 | 4014783920 |
28 | 7980869832 |
29 | 12542045310 |
[1,9,56,219,630,2016,4472,12285,25738,62370, 118548,294336,512134,1167192,2152080,4620147, 7847658,17604792,28681660,62224470,105431872, 212319468,348698376,759507840,1181718775, 2401396326,4014783920,7980869832,12542045310] |