n | a(n) |
---|---|
0 | 1 |
1 | 18 |
2 | 189 |
3 | 1512 |
4 | 10206 |
5 | 61236 |
6 | 336798 |
7 | 1732104 |
8 | 8444007 |
9 | 39405366 |
10 | 177324147 |
11 | 773778096 |
12 | 3288556908 |
13 | 13660159464 |
14 | 55616363532 |
15 | 222465454128 |
16 | 875957725629 |
17 | 3400777052442 |
18 | 13036312034361 |
19 | 49400761393368 |
20 | 185252855225130 |
21 | 688082033693340 |
22 | 2533392942234570 |
[1,18,189,1512,10206,61236,336798,1732104,8444007, 39405366,177324147,773778096,3288556908, 13660159464,55616363532,222465454128,875957725629, 3400777052442,13036312034361,49400761393368, 185252855225130,688082033693340,2533392942234570] |