n | a(n) |
---|---|
0 | 1 |
1 | 9 |
2 | 54 |
3 | 255 |
4 | 1035 |
5 | 3753 |
6 | 12483 |
7 | 38709 |
8 | 113265 |
9 | 315445 |
10 | 841842 |
11 | 2164185 |
12 | 5382276 |
13 | 12994290 |
14 | 30543210 |
15 | 70066809 |
16 | 157199805 |
17 | 345552183 |
18 | 745377215 |
19 | 1579915080 |
20 | 3294664578 |
21 | 6766656315 |
22 | 13700560491 |
23 | 27370137195 |
24 | 53991639855 |
25 | 105242612526 |
26 | 202837976145 |
[1,9,54,255,1035,3753,12483,38709,113265,315445, 841842,2164185,5382276,12994290,30543210,70066809, 157199805,345552183,745377215,1579915080, 3294664578,6766656315,13700560491,27370137195, 53991639855,105242612526,202837976145] |