n | a(n) |
---|---|
1 | 4 |
2 | 12 |
3 | 33 |
4 | 87 |
5 | 223 |
6 | 559 |
7 | 1375 |
8 | 3327 |
9 | 7935 |
10 | 18687 |
11 | 43519 |
12 | 100351 |
13 | 229375 |
14 | 520191 |
15 | 1171455 |
16 | 2621439 |
17 | 5832703 |
18 | 12910591 |
19 | 28442623 |
20 | 62390271 |
21 | 136314879 |
22 | 296747007 |
23 | 643825663 |
24 | 1392508927 |
25 | 3003121663 |
26 | 6459228159 |
27 | 13857980415 |
28 | 29662117887 |
29 | 63350767615 |
[4,12,33,87,223,559,1375,3327,7935,18687,43519, 100351,229375,520191,1171455,2621439,5832703, 12910591,28442623,62390271,136314879,296747007, 643825663,1392508927,3003121663,6459228159, 13857980415,29662117887,63350767615] |