n | a(n) |
---|---|
3 | 1 |
4 | 9 |
5 | 54 |
6 | 270 |
7 | 1215 |
8 | 5103 |
9 | 20412 |
10 | 78732 |
11 | 295245 |
12 | 1082565 |
13 | 3897234 |
14 | 13817466 |
15 | 48361131 |
16 | 167403915 |
17 | 573956280 |
18 | 1951451352 |
19 | 6586148313 |
20 | 22082967873 |
21 | 73609892910 |
22 | 244074908070 |
23 | 805447196631 |
24 | 2646469360359 |
25 | 8661172452084 |
26 | 28242953648100 |
27 | 91789599356325 |
28 | 297398301914493 |
29 | 960825283108362 |
30 | 3095992578904722 |
[1,9,54,270,1215,5103,20412,78732,295245,1082565, 3897234,13817466,48361131,167403915,573956280, 1951451352,6586148313,22082967873,73609892910, 244074908070,805447196631,2646469360359, 8661172452084,28242953648100,91789599356325, 297398301914493,960825283108362,3095992578904722] |