n | a(n) |
---|---|
0 | 1 |
1 | 27 |
2 | 385 |
3 | 4004 |
4 | 34398 |
5 | 259896 |
6 | 1790712 |
7 | 11511720 |
8 | 70114902 |
9 | 409003595 |
10 | 2303105805 |
11 | 12593413560 |
12 | 67173369900 |
13 | 350777861280 |
14 | 1798432526880 |
15 | 9073909567440 |
16 | 45140379405030 |
17 | 221768094898350 |
18 | 1077403874372826 |
19 | 5182007298602904 |
20 | 24699073588138180 |
21 | 116759256962107760 |
[1,27,385,4004,34398,259896,1790712,11511720, 70114902,409003595,2303105805,12593413560, 67173369900,350777861280,1798432526880, 9073909567440,45140379405030,221768094898350, 1077403874372826,5182007298602904, 24699073588138180,116759256962107760] |