n | a(n) |
---|---|
6 | 1 |
7 | 12 |
8 | 84 |
9 | 442 |
10 | 1932 |
11 | 7392 |
12 | 25551 |
13 | 81468 |
14 | 243126 |
15 | 686400 |
16 | 1848156 |
17 | 4775874 |
18 | 11904215 |
19 | 28737732 |
20 | 67416756 |
21 | 154122912 |
22 | 344177823 |
23 | 752310720 |
24 | 1612395007 |
25 | 3393652848 |
26 | 7023685794 |
27 | 14311193104 |
28 | 28737793986 |
29 | 56924936052 |
30 | 111323290934 |
31 | 215095157964 |
32 | 410895944148 |
33 | 776529566516 |
[1,12,84,442,1932,7392,25551,81468,243126,686400, 1848156,4775874,11904215,28737732,67416756, 154122912,344177823,752310720,1612395007, 3393652848,7023685794,14311193104,28737793986, 56924936052,111323290934,215095157964, 410895944148,776529566516] |