n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 9 |
3 | 48 |
4 | 289 |
5 | 1761 |
6 | 10932 |
7 | 68664 |
8 | 435201 |
9 | 2777763 |
10 | 17829489 |
11 | 114968052 |
12 | 744178716 |
13 | 4832624044 |
14 | 31469746632 |
15 | 205422018288 |
16 | 1343734578561 |
17 | 8806130111847 |
18 | 57805893969531 |
19 | 380013533789928 |
20 | 2501507255441049 |
21 | 16486378106441697 |
22 | 108773240389894056 |
[1,1,9,48,289,1761,10932,68664,435201,2777763, 17829489,114968052,744178716,4832624044, 31469746632,205422018288,1343734578561, 8806130111847,57805893969531,380013533789928, 2501507255441049,16486378106441697, 108773240389894056] |