n | a(n) |
---|---|
0 | 1 |
1 | 21 |
2 | 131 |
3 | 471 |
4 | 1251 |
5 | 2751 |
6 | 5321 |
7 | 9381 |
8 | 15421 |
9 | 24001 |
10 | 35751 |
11 | 51371 |
12 | 71631 |
13 | 97371 |
14 | 129501 |
15 | 169001 |
16 | 216921 |
17 | 274381 |
18 | 342571 |
19 | 422751 |
20 | 516251 |
21 | 624471 |
22 | 748881 |
23 | 891021 |
24 | 1052501 |
25 | 1235001 |
26 | 1440271 |
[1,21,131,471,1251,2751,5321,9381,15421,24001, 35751,51371,71631,97371,129501,169001,216921, 274381,342571,422751,516251,624471,748881,891021, 1052501,1235001,1440271] |