n | a(n) |
---|---|
1 | 0 |
2 | 6 |
3 | 27 |
4 | 130 |
5 | 1241 |
6 | 8825 |
7 | 72751 |
8 | 589816 |
9 | 4803248 |
10 | 39358999 |
11 | 321999354 |
12 | 2638098994 |
13 | 21610813691 |
14 | 177055481680 |
15 | 1450660059735 |
16 | 11885674778667 |
17 | 97384006706676 |
18 | 797906117503448 |
19 | 6537576734601907 |
20 | 53565114537762363 |
21 | 438881605139973564 |
[0,6,27,130,1241,8825,72751,589816,4803248, 39358999,321999354,2638098994,21610813691, 177055481680,1450660059735,11885674778667, 97384006706676,797906117503448,6537576734601907, 53565114537762363,438881605139973564] |