n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 6 |
3 | 27 |
4 | 116 |
5 | 493 |
6 | 2090 |
7 | 8855 |
8 | 37512 |
9 | 158905 |
10 | 673134 |
11 | 2851443 |
12 | 12078908 |
13 | 51167077 |
14 | 216747218 |
15 | 918155951 |
16 | 3889371024 |
17 | 16475640049 |
18 | 69791931222 |
19 | 295643364939 |
20 | 1252365390980 |
21 | 5305104928861 |
22 | 22472785106426 |
23 | 95196245354567 |
24 | 403257766524696 |
25 | 1708227311453353 |
26 | 7236167012338110 |
[0,1,6,27,116,493,2090,8855,37512,158905,673134, 2851443,12078908,51167077,216747218,918155951, 3889371024,16475640049,69791931222,295643364939, 1252365390980,5305104928861,22472785106426, 95196245354567,403257766524696,1708227311453353, 7236167012338110] |