n | a(n) |
---|---|
0 | 1 |
1 | 7 |
2 | 39 |
3 | 191 |
4 | 875 |
5 | 3843 |
6 | 16423 |
7 | 68887 |
8 | 285219 |
9 | 1170059 |
10 | 4768127 |
11 | 19336863 |
12 | 78141883 |
13 | 314953555 |
14 | 1266977751 |
15 | 5089412519 |
16 | 20422176467 |
17 | 81882328731 |
18 | 328110270895 |
19 | 1314184126255 |
20 | 5261965982571 |
21 | 21063553061987 |
[1,7,39,191,875,3843,16423,68887,285219,1170059, 4768127,19336863,78141883,314953555,1266977751, 5089412519,20422176467,81882328731,328110270895, 1314184126255,5261965982571,21063553061987] |