n | a(n) |
---|---|
1 | 0 |
2 | 0 |
3 | 3 |
4 | 27 |
5 | 180 |
6 | 1089 |
7 | 6333 |
8 | 36309 |
9 | 207255 |
10 | 1184829 |
11 | 6799473 |
12 | 39224568 |
13 | 227554278 |
14 | 1327688328 |
15 | 7789644996 |
16 | 45944320449 |
17 | 272329169232 |
18 | 1621636729257 |
19 | 9697502473014 |
20 | 58219671592098 |
21 | 350791368690516 |
22 | 2120672113779573 |
23 | 12859687160772771 |
24 | 78201772222916649 |
[0,0,3,27,180,1089,6333,36309,207255,1184829, 6799473,39224568,227554278,1327688328,7789644996, 45944320449,272329169232,1621636729257, 9697502473014,58219671592098,350791368690516, 2120672113779573,12859687160772771, 78201772222916649] |