n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 7 |
3 | 27 |
4 | 98 |
5 | 323 |
6 | 1085 |
7 | 3471 |
8 | 10998 |
9 | 33874 |
10 | 102737 |
11 | 305849 |
12 | 897899 |
13 | 2597822 |
14 | 7423408 |
15 | 20957775 |
16 | 58524868 |
17 | 161741013 |
18 | 442705279 |
19 | 1200718351 |
20 | 3228796864 |
21 | 8611973548 |
22 | 22793714865 |
23 | 59887897679 |
24 | 156252738062 |
25 | 404964879419 |
26 | 1042884107691 |
27 | 2669317020743 |
28 | 6792321636929 |
[1,1,7,27,98,323,1085,3471,10998,33874,102737, 305849,897899,2597822,7423408,20957775,58524868, 161741013,442705279,1200718351,3228796864, 8611973548,22793714865,59887897679,156252738062, 404964879419,1042884107691,2669317020743, 6792321636929] |