n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 4 |
4 | 9 |
5 | 21 |
6 | 51 |
7 | 127 |
8 | 323 |
9 | 835 |
10 | 2188 |
11 | 5798 |
12 | 15510 |
13 | 41822 |
14 | 113531 |
15 | 309937 |
16 | 850118 |
17 | 2340918 |
18 | 6466953 |
19 | 17913087 |
20 | 49726649 |
21 | 138287113 |
22 | 385126811 |
23 | 1073832695 |
24 | 2996974774 |
25 | 8370739326 |
26 | 23394528640 |
27 | 65415732100 |
28 | 182989086965 |
29 | 512046072481 |
30 | 1433197869570 |
[1,1,2,4,9,21,51,127,323,835,2188,5798,15510, 41822,113531,309937,850118,2340918,6466953, 17913087,49726649,138287113,385126811,1073832695, 2996974774,8370739326,23394528640,65415732100, 182989086965,512046072481,1433197869570] |