n | a(n) |
---|---|
0 | 1 |
1 | 15 |
2 | 105 |
3 | 495 |
4 | 1815 |
5 | 5577 |
6 | 15015 |
7 | 36465 |
8 | 81510 |
9 | 170170 |
10 | 335478 |
11 | 629850 |
12 | 1133730 |
13 | 1967070 |
14 | 3304290 |
15 | 5393454 |
16 | 8580495 |
17 | 13339425 |
18 | 20309575 |
19 | 30341025 |
20 | 44549505 |
21 | 64382175 |
22 | 91695825 |
23 | 128849175 |
24 | 178811100 |
25 | 245286756 |
26 | 332863740 |
27 | 447180580 |
[1,15,105,495,1815,5577,15015,36465,81510,170170, 335478,629850,1133730,1967070,3304290,5393454, 8580495,13339425,20309575,30341025,44549505, 64382175,91695825,128849175,178811100,245286756, 332863740,447180580] |