n | a(n) |
---|---|
1 | 0 |
2 | 3 |
3 | 9 |
4 | 29 |
5 | 74 |
6 | 179 |
7 | 403 |
8 | 871 |
9 | 1816 |
10 | 3686 |
11 | 7316 |
12 | 14258 |
13 | 27362 |
14 | 51827 |
15 | 97067 |
16 | 180027 |
17 | 331038 |
18 | 604125 |
19 | 1095085 |
20 | 1973095 |
21 | 3535810 |
22 | 6305148 |
23 | 11193384 |
24 | 19790484 |
25 | 34860084 |
26 | 61193859 |
27 | 107080413 |
28 | 186826121 |
29 | 325073906 |
30 | 564190391 |
[0,3,9,29,74,179,403,871,1816,3686,7316,14258, 27362,51827,97067,180027,331038,604125,1095085, 1973095,3535810,6305148,11193384,19790484, 34860084,61193859,107080413,186826121,325073906, 564190391] |