n | a(n) |
---|---|
3 | 0 |
4 | 2 |
5 | 2 |
6 | 7 |
7 | 13 |
8 | 25 |
9 | 42 |
10 | 81 |
11 | 193 |
12 | 454 |
13 | 1041 |
14 | 2502 |
15 | 6242 |
16 | 13807 |
17 | 35326 |
18 | 87295 |
19 | 209812 |
20 | 548575 |
21 | 1343566 |
22 | 3489028 |
23 | 8907422 |
24 | 22985251 |
25 | 59673055 |
26 | 154469560 |
27 | 402551592 |
28 | 1046972388 |
29 | 2729730656 |
30 | 7118291151 |
31 | 18566002813 |
[0,2,2,7,13,25,42,81,193,454,1041,2502,6242,13807, 35326,87295,209812,548575,1343566,3489028,8907422, 22985251,59673055,154469560,402551592,1046972388, 2729730656,7118291151,18566002813] |