n | a(n) |
---|---|
1 | 1 |
2 | 2 |
3 | 4 |
4 | 9 |
5 | 19 |
6 | 54 |
7 | 145 |
8 | 458 |
9 | 1468 |
10 | 4936 |
11 | 16885 |
12 | 58996 |
13 | 208245 |
14 | 743422 |
15 | 2675088 |
16 | 9696297 |
17 | 35359267 |
18 | 129648938 |
19 | 477642881 |
20 | 1767274939 |
21 | 6564131656 |
22 | 24466301616 |
23 | 91482592297 |
24 | 343059720014 |
25 | 1289904222419 |
26 | 4861946731090 |
[1,2,4,9,19,54,145,458,1468,4936,16885,58996, 208245,743422,2675088,9696297,35359267,129648938, 477642881,1767274939,6564131656,24466301616, 91482592297,343059720014,1289904222419, 4861946731090] |