n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 4 |
3 | 9 |
4 | 22 |
5 | 57 |
6 | 155 |
7 | 441 |
8 | 1311 |
9 | 4066 |
10 | 13130 |
11 | 44046 |
12 | 153144 |
13 | 550706 |
14 | 2044248 |
15 | 7819897 |
16 | 30779570 |
17 | 124487688 |
18 | 516723174 |
19 | 2198726181 |
20 | 9581247648 |
21 | 42717268934 |
22 | 194688593966 |
23 | 906331074605 |
24 | 4306472500778 |
25 | 20871165469241 |
26 | 103106015116437 |
[1,2,4,9,22,57,155,441,1311,4066,13130,44046, 153144,550706,2044248,7819897,30779570,124487688, 516723174,2198726181,9581247648,42717268934, 194688593966,906331074605,4306472500778, 20871165469241,103106015116437] |