n | a(n) |
---|---|
0 | -1 |
1 | 6 |
2 | 105 |
3 | 440 |
4 | 1155 |
5 | 2394 |
6 | 4301 |
7 | 7020 |
8 | 10695 |
9 | 15470 |
10 | 21489 |
11 | 28896 |
12 | 37835 |
13 | 48450 |
14 | 60885 |
15 | 75284 |
16 | 91791 |
17 | 110550 |
18 | 131705 |
19 | 155400 |
20 | 181779 |
21 | 210986 |
22 | 243165 |
23 | 278460 |
24 | 317015 |
25 | 358974 |
26 | 404481 |
27 | 453680 |
28 | 506715 |
[-1,6,105,440,1155,2394,4301,7020,10695,15470, 21489,28896,37835,48450,60885,75284,91791,110550, 131705,155400,181779,210986,243165,278460,317015, 358974,404481,453680,506715] |