n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 3 |
3 | 27 |
4 | 162 |
5 | 810 |
6 | 3645 |
7 | 15309 |
8 | 61236 |
9 | 236196 |
10 | 885735 |
11 | 3247695 |
12 | 11691702 |
13 | 41452398 |
14 | 145083393 |
15 | 502211745 |
16 | 1721868840 |
17 | 5854354056 |
18 | 19758444939 |
19 | 66248903619 |
20 | 220829678730 |
21 | 732224724210 |
22 | 2416341589893 |
23 | 7939408081077 |
[0,0,3,27,162,810,3645,15309,61236,236196,885735, 3247695,11691702,41452398,145083393,502211745, 1721868840,5854354056,19758444939,66248903619, 220829678730,732224724210,2416341589893, 7939408081077] |