n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 2 |
3 | 1 |
4 | 9 |
5 | 11 |
6 | 56 |
7 | 106 |
8 | 421 |
9 | 1009 |
10 | 3565 |
11 | 9736 |
12 | 32594 |
13 | 95811 |
14 | 313535 |
15 | 961780 |
16 | 3123577 |
17 | 9831373 |
18 | 31915121 |
19 | 102110314 |
20 | 332366526 |
21 | 1075228773 |
22 | 3513373374 |
23 | 11456961550 |
24 | 37590603312 |
25 | 123327267531 |
26 | 406246177511 |
27 | 1339274997451 |
28 | 4427777075497 |
29 | 14655559052686 |
[1,0,2,1,9,11,56,106,421,1009,3565,9736,32594, 95811,313535,961780,3123577,9831373,31915121, 102110314,332366526,1075228773,3513373374, 11456961550,37590603312,123327267531,406246177511, 1339274997451,4427777075497,14655559052686] |