n | a(n) |
---|---|
0 | 0 |
1 | 3 |
2 | 6 |
3 | 63 |
4 | 228 |
5 | 1527 |
6 | 6930 |
7 | 39819 |
8 | 197448 |
9 | 1071819 |
10 | 5500254 |
11 | 29221431 |
12 | 151947180 |
13 | 800658687 |
14 | 4184419434 |
15 | 21980036547 |
16 | 115095203472 |
17 | 603851028243 |
18 | 3164320515510 |
19 | 16594108511151 |
20 | 86981665785972 |
21 | 456063176261511 |
22 | 2390814670884546 |
23 | 12534703338214779 |
[0,3,6,63,228,1527,6930,39819,197448,1071819, 5500254,29221431,151947180,800658687,4184419434, 21980036547,115095203472,603851028243, 3164320515510,16594108511151,86981665785972, 456063176261511,2390814670884546, 12534703338214779] |