n | a(n) |
---|---|
0 | 0 |
1 | 6 |
2 | 60 |
3 | 314 |
4 | 1240 |
5 | 4166 |
6 | 12600 |
7 | 35324 |
8 | 93576 |
9 | 236944 |
10 | 578764 |
11 | 1371478 |
12 | 3169380 |
13 | 7165478 |
14 | 15901324 |
15 | 34705018 |
16 | 74661832 |
17 | 158529158 |
18 | 332756408 |
19 | 691084378 |
20 | 1421836528 |
21 | 2899678894 |
22 | 5867341452 |
23 | 11784640984 |
24 | 23512608484 |
[0,6,60,314,1240,4166,12600,35324,93576,236944, 578764,1371478,3169380,7165478,15901324,34705018, 74661832,158529158,332756408,691084378,1421836528, 2899678894,5867341452,11784640984,23512608484] |