n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 18 |
3 | 108 |
4 | 822 |
5 | 4796 |
6 | 37492 |
7 | 231704 |
8 | 1738150 |
9 | 11857004 |
10 | 87262684 |
11 | 617409128 |
12 | 4638712124 |
13 | 33724007896 |
14 | 253800160808 |
15 | 1894353653552 |
16 | 14350905612038 |
17 | 108412437326412 |
18 | 827441075006796 |
19 | 6308125533133896 |
20 | 48388714839180756 |
21 | 371391625244862600 |
22 | 2860885559165073624 |
[1,2,18,108,822,4796,37492,231704,1738150, 11857004,87262684,617409128,4638712124, 33724007896,253800160808,1894353653552, 14350905612038,108412437326412,827441075006796, 6308125533133896,48388714839180756, 371391625244862600,2860885559165073624] |