n | a(n) |
---|---|
0 | 1 |
1 | 4 |
2 | 20 |
3 | 96 |
4 | 432 |
5 | 1856 |
6 | 7744 |
7 | 31744 |
8 | 128768 |
9 | 519168 |
10 | 2085888 |
11 | 8364032 |
12 | 33501184 |
13 | 134103040 |
14 | 536625152 |
15 | 2146959360 |
16 | 8588820480 |
17 | 34357379072 |
18 | 137433972736 |
19 | 549745328128 |
20 | 2199001235456 |
21 | 8796046884864 |
22 | 35184275619840 |
23 | 140737287028736 |
24 | 562949533990912 |
[1,4,20,96,432,1856,7744,31744,128768,519168, 2085888,8364032,33501184,134103040,536625152, 2146959360,8588820480,34357379072,137433972736, 549745328128,2199001235456,8796046884864, 35184275619840,140737287028736,562949533990912] |