n | a(n) |
---|---|
0 | 0 |
1 | 4 |
2 | 20 |
3 | 84 |
4 | 340 |
5 | 1364 |
6 | 5460 |
7 | 21844 |
8 | 87380 |
9 | 349524 |
10 | 1398100 |
11 | 5592404 |
12 | 22369620 |
13 | 89478484 |
14 | 357913940 |
15 | 1431655764 |
16 | 5726623060 |
17 | 22906492244 |
18 | 91625968980 |
19 | 366503875924 |
20 | 1466015503700 |
21 | 5864062014804 |
22 | 23456248059220 |
23 | 93824992236884 |
24 | 375299968947540 |
25 | 1501199875790164 |
[0,4,20,84,340,1364,5460,21844,87380,349524, 1398100,5592404,22369620,89478484,357913940, 1431655764,5726623060,22906492244,91625968980, 366503875924,1466015503700,5864062014804, 23456248059220,93824992236884,375299968947540, 1501199875790164] |