n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 4 |
4 | 9 |
5 | 21 |
6 | 51 |
7 | 127 |
8 | 323 |
9 | 834 |
10 | 2179 |
11 | 5743 |
12 | 15238 |
13 | 40637 |
14 | 108800 |
15 | 292200 |
16 | 786703 |
17 | 2122387 |
18 | 5735596 |
19 | 15522682 |
20 | 42064028 |
21 | 114117541 |
22 | 309918698 |
23 | 842489130 |
24 | 2292332265 |
25 | 6242655886 |
[1,1,2,4,9,21,51,127,323,834,2179,5743,15238, 40637,108800,292200,786703,2122387,5735596, 15522682,42064028,114117541,309918698,842489130, 2292332265,6242655886] |