n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 1 |
3 | 6 |
4 | 9 |
5 | 31 |
6 | 60 |
7 | 169 |
8 | 369 |
9 | 954 |
10 | 2201 |
11 | 5479 |
12 | 12960 |
13 | 31721 |
14 | 75881 |
15 | 184326 |
16 | 443169 |
17 | 1072871 |
18 | 2585340 |
19 | 6249329 |
20 | 15074649 |
21 | 36413754 |
22 | 87877681 |
23 | 212208719 |
24 | 512231040 |
25 | 1236774481 |
26 | 2985612241 |
27 | 7208270406 |
28 | 17401713849 |
29 | 42012408751 |
[0,1,1,6,9,31,60,169,369,954,2201,5479,12960, 31721,75881,184326,443169,1072871,2585340,6249329, 15074649,36413754,87877681,212208719,512231040, 1236774481,2985612241,7208270406,17401713849, 42012408751] |