n | a(n) |
---|---|
9 | 1 |
10 | 27 |
11 | 378 |
12 | 3681 |
13 | 28134 |
14 | 180198 |
15 | 1007370 |
16 | 5051790 |
17 | 23173047 |
18 | 98644395 |
19 | 394006761 |
20 | 1489460724 |
21 | 5365964511 |
22 | 18526724685 |
23 | 61587671283 |
24 | 197885754837 |
25 | 616568620176 |
26 | 1868127089697 |
27 | 5517376711191 |
28 | 15917134652829 |
29 | 44935916034951 |
30 | 124340811582540 |
31 | 337706753653476 |
[1,27,378,3681,28134,180198,1007370,5051790, 23173047,98644395,394006761,1489460724,5365964511, 18526724685,61587671283,197885754837,616568620176, 1868127089697,5517376711191,15917134652829, 44935916034951,124340811582540,337706753653476] |