n | a(n) |
---|---|
0 | 1 |
1 | 11 |
2 | 90 |
3 | 648 |
4 | 4272 |
5 | 25810 |
6 | 145138 |
7 | 766518 |
8 | 3834490 |
9 | 18286018 |
10 | 83570177 |
11 | 367774928 |
12 | 1564548863 |
13 | 6452004367 |
14 | 25847879345 |
15 | 100777951798 |
16 | 383035877989 |
17 | 1421435174008 |
18 | 5157779243758 |
19 | 18324309623403 |
20 | 63818201253153 |
[1,11,90,648,4272,25810,145138,766518,3834490, 18286018,83570177,367774928,1564548863,6452004367, 25847879345,100777951798,383035877989, 1421435174008,5157779243758,18324309623403, 63818201253153] |