n | a(n) |
---|---|
1 | 4 |
2 | 12 |
3 | 28 |
4 | 76 |
5 | 204 |
6 | 540 |
7 | 1404 |
8 | 3724 |
9 | 9748 |
10 | 25772 |
11 | 67940 |
12 | 179068 |
13 | 472580 |
14 | 1245620 |
15 | 3286308 |
16 | 8666956 |
17 | 22861604 |
18 | 60301764 |
19 | 159063748 |
20 | 419582396 |
21 | 1106796012 |
22 | 2919664716 |
23 | 7701735292 |
24 | 20317148476 |
25 | 53595401604 |
26 | 141385319932 |
27 | 372973583908 |
28 | 983913216292 |
29 | 2595592842460 |
[4,12,28,76,204,540,1404,3724,9748,25772,67940, 179068,472580,1245620,3286308,8666956,22861604, 60301764,159063748,419582396,1106796012, 2919664716,7701735292,20317148476,53595401604, 141385319932,372973583908,983913216292, 2595592842460] |