n | a(n) |
---|---|
1 | 4 |
2 | 16 |
3 | 64 |
4 | 232 |
5 | 696 |
6 | 2072 |
7 | 6130 |
8 | 18378 |
9 | 55716 |
10 | 169734 |
11 | 517764 |
12 | 1578184 |
13 | 4806344 |
14 | 14629384 |
15 | 44519552 |
16 | 135480532 |
17 | 412314438 |
18 | 1254882280 |
19 | 3819338704 |
20 | 11624541548 |
21 | 35380360780 |
22 | 107682931160 |
23 | 327740673246 |
24 | 997501106370 |
25 | 3035962621026 |
[4,16,64,232,696,2072,6130,18378,55716,169734, 517764,1578184,4806344,14629384,44519552, 135480532,412314438,1254882280,3819338704, 11624541548,35380360780,107682931160,327740673246, 997501106370,3035962621026] |