n | a(n) |
---|---|
3 | 18 |
4 | 70 |
5 | 224 |
6 | 648 |
7 | 1760 |
8 | 4576 |
9 | 11520 |
10 | 28288 |
11 | 68096 |
12 | 161280 |
13 | 376832 |
14 | 870400 |
15 | 1990656 |
16 | 4513792 |
17 | 10158080 |
18 | 22708224 |
19 | 50462720 |
20 | 111542272 |
21 | 245366784 |
22 | 537395200 |
23 | 1172307968 |
24 | 2548039680 |
25 | 5519704064 |
26 | 11920211968 |
27 | 25669140480 |
[18,70,224,648,1760,4576,11520,28288,68096,161280, 376832,870400,1990656,4513792,10158080,22708224, 50462720,111542272,245366784,537395200,1172307968, 2548039680,5519704064,11920211968,25669140480] |