n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 5 |
3 | 14 |
4 | 45 |
5 | 152 |
6 | 535 |
7 | 1943 |
8 | 7289 |
9 | 27876 |
10 | 108448 |
11 | 428477 |
12 | 1716434 |
13 | 6947541 |
14 | 28393225 |
15 | 117079643 |
16 | 486515806 |
17 | 2034989189 |
18 | 8565051207 |
19 | 36256323523 |
20 | 154246683731 |
21 | 659219337990 |
22 | 2829613175204 |
23 | 12193980235432 |
24 | 52737388566862 |
25 | 228850945637483 |
26 | 996246088634899 |
27 | 4349589171641900 |
[1,2,5,14,45,152,535,1943,7289,27876,108448, 428477,1716434,6947541,28393225,117079643, 486515806,2034989189,8565051207,36256323523, 154246683731,659219337990,2829613175204, 12193980235432,52737388566862,228850945637483, 996246088634899,4349589171641900] |