n | a(n) |
---|---|
1 | 4 |
2 | 13 |
3 | 20 |
4 | 45 |
5 | 148 |
6 | 529 |
7 | 1747 |
8 | 5797 |
9 | 19584 |
10 | 66222 |
11 | 223320 |
12 | 753486 |
13 | 2543959 |
14 | 8589093 |
15 | 28995289 |
16 | 97886648 |
17 | 330471005 |
18 | 1115681398 |
19 | 3766562359 |
20 | 12716019134 |
21 | 42929679141 |
22 | 144931880115 |
23 | 489294288989 |
24 | 1651872133532 |
25 | 5576769838008 |
[4,13,20,45,148,529,1747,5797,19584,66222,223320, 753486,2543959,8589093,28995289,97886648, 330471005,1115681398,3766562359,12716019134, 42929679141,144931880115,489294288989, 1651872133532,5576769838008] |