n | a(n) |
---|---|
1 | 0 |
2 | 0 |
3 | 0 |
4 | 1 |
5 | 16 |
6 | 126 |
7 | 672 |
8 | 2772 |
9 | 9504 |
10 | 28314 |
11 | 75504 |
12 | 184041 |
13 | 416416 |
14 | 884884 |
15 | 1782144 |
16 | 3426384 |
17 | 6325632 |
18 | 11267532 |
19 | 19442016 |
20 | 32605881 |
21 | 53300016 |
22 | 85131970 |
23 | 133138720 |
24 | 204246900 |
25 | 307850400 |
26 | 456528150 |
27 | 666928080 |
28 | 960846705 |
29 | 1366537536 |
30 | 1920285576 |
31 | 2668289536 |
[0,0,0,1,16,126,672,2772,9504,28314,75504,184041, 416416,884884,1782144,3426384,6325632,11267532, 19442016,32605881,53300016,85131970,133138720, 204246900,307850400,456528150,666928080,960846705, 1366537536,1920285576,2668289536] |