n | a(n) |
---|---|
5 | 1 |
6 | 12 |
7 | 90 |
8 | 544 |
9 | 2907 |
10 | 14364 |
11 | 67298 |
12 | 303600 |
13 | 1332045 |
14 | 5722860 |
15 | 24192090 |
16 | 100975680 |
17 | 417225900 |
18 | 1709984304 |
19 | 6962078952 |
20 | 28192122176 |
21 | 113649492522 |
22 | 456442180920 |
23 | 1827459250276 |
24 | 7297426411968 |
25 | 29075683360185 |
26 | 115631433392020 |
27 | 459124809056550 |
28 | 1820529677650320 |
29 | 7210477496434485 |
[1,12,90,544,2907,14364,67298,303600,1332045, 5722860,24192090,100975680,417225900,1709984304, 6962078952,28192122176,113649492522,456442180920, 1827459250276,7297426411968,29075683360185, 115631433392020,459124809056550,1820529677650320, 7210477496434485] |