n | a(n) |
---|---|
5 | 5 |
6 | 30 |
7 | 147 |
8 | 672 |
9 | 2970 |
10 | 12825 |
11 | 54450 |
12 | 228294 |
13 | 948090 |
14 | 3907995 |
15 | 16011905 |
16 | 65280800 |
17 | 265055772 |
18 | 1072443810 |
19 | 4326290424 |
20 | 17407489065 |
21 | 69884197635 |
22 | 280002750720 |
23 | 1119913829375 |
24 | 4472279679846 |
25 | 17834705765630 |
26 | 71032337773930 |
27 | 282586675707180 |
28 | 1123047360182475 |
[5,30,147,672,2970,12825,54450,228294,948090, 3907995,16011905,65280800,265055772,1072443810, 4326290424,17407489065,69884197635,280002750720, 1119913829375,4472279679846,17834705765630, 71032337773930,282586675707180,1123047360182475] |