n | a(n) |
---|---|
0 | 1 |
1 | 6 |
2 | 21 |
3 | 56 |
4 | 126 |
5 | 251 |
6 | 456 |
7 | 771 |
8 | 1231 |
9 | 1876 |
10 | 2751 |
11 | 3906 |
12 | 5396 |
13 | 7281 |
14 | 9626 |
15 | 12501 |
16 | 15981 |
17 | 20146 |
18 | 25081 |
19 | 30876 |
20 | 37626 |
21 | 45431 |
22 | 54396 |
23 | 64631 |
24 | 76251 |
25 | 89376 |
26 | 104131 |
27 | 120646 |
28 | 139056 |
29 | 159501 |
30 | 182126 |
[1,6,21,56,126,251,456,771,1231,1876,2751,3906, 5396,7281,9626,12501,15981,20146,25081,30876, 37626,45431,54396,64631,76251,89376,104131,120646, 139056,159501,182126] |