n | a(n) |
---|---|
0 | 2 |
1 | 4 |
2 | 9 |
3 | 23 |
4 | 55 |
5 | 126 |
6 | 293 |
7 | 680 |
8 | 1581 |
9 | 3676 |
10 | 8546 |
11 | 19867 |
12 | 46185 |
13 | 107367 |
14 | 249598 |
15 | 580245 |
16 | 1348906 |
17 | 3135826 |
18 | 7289911 |
19 | 16946987 |
20 | 39396965 |
21 | 91586832 |
22 | 212913553 |
23 | 494963960 |
24 | 1150651606 |
25 | 2674940451 |
26 | 6218482101 |
27 | 14456217007 |
28 | 33606627270 |
[2,4,9,23,55,126,293,680,1581,3676,8546,19867, 46185,107367,249598,580245,1348906,3135826, 7289911,16946987,39396965,91586832,212913553, 494963960,1150651606,2674940451,6218482101, 14456217007,33606627270] |