n | a(n) |
---|---|
4 | 1 |
5 | 9 |
6 | 51 |
7 | 209 |
8 | 696 |
9 | 1980 |
10 | 5000 |
11 | 11475 |
12 | 24375 |
13 | 48545 |
14 | 91581 |
15 | 164934 |
16 | 285376 |
17 | 476784 |
18 | 772416 |
19 | 1217610 |
20 | 1873125 |
21 | 2819025 |
22 | 4159375 |
23 | 6027615 |
24 | 8592936 |
25 | 12067484 |
26 | 16714776 |
27 | 22859109 |
28 | 30896411 |
29 | 41306265 |
30 | 54665625 |
31 | 71663900 |
[1,9,51,209,696,1980,5000,11475,24375,48545,91581, 164934,285376,476784,772416,1217610,1873125, 2819025,4159375,6027615,8592936,12067484,16714776, 22859109,30896411,41306265,54665625,71663900] |