n | a(n) |
---|---|
1 | 1 |
2 | 3 |
3 | 6 |
4 | 15 |
5 | 31 |
6 | 92 |
7 | 267 |
8 | 1023 |
9 | 4404 |
10 | 21705 |
11 | 116999 |
12 | 680790 |
13 | 4217693 |
14 | 27653099 |
15 | 190915798 |
16 | 1382993235 |
17 | 10480207683 |
18 | 82865009684 |
19 | 682077068303 |
20 | 5832742772351 |
21 | 51724159284888 |
22 | 474869818486877 |
23 | 4506715742641627 |
[1,3,6,15,31,92,267,1023,4404,21705,116999,680790, 4217693,27653099,190915798,1382993235,10480207683, 82865009684,682077068303,5832742772351, 51724159284888,474869818486877,4506715742641627] |