n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | 2 |
4 | 6 |
5 | 16 |
6 | 40 |
7 | 107 |
8 | 307 |
9 | 893 |
10 | 2597 |
11 | 7646 |
12 | 22878 |
13 | 69162 |
14 | 210402 |
15 | 644098 |
16 | 1984598 |
17 | 6149428 |
18 | 19143220 |
19 | 59840692 |
20 | 187781992 |
21 | 591343894 |
22 | 1868106990 |
23 | 5918537492 |
24 | 18800935948 |
25 | 59869902152 |
26 | 191081899648 |
27 | 611138052146 |
28 | 1958410654202 |
29 | 6287175115130 |
30 | 20218209139666 |
31 | 65120537016867 |
[1,1,1,2,6,16,40,107,307,893,2597,7646,22878, 69162,210402,644098,1984598,6149428,19143220, 59840692,187781992,591343894,1868106990, 5918537492,18800935948,59869902152,191081899648, 611138052146,1958410654202,6287175115130, 20218209139666,65120537016867] |