n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 7 |
4 | 31 |
5 | 145 |
6 | 673 |
7 | 3127 |
8 | 14527 |
9 | 67489 |
10 | 313537 |
11 | 1456615 |
12 | 6767071 |
13 | 31438129 |
14 | 146053729 |
15 | 678529303 |
16 | 3152278399 |
17 | 14644701505 |
18 | 68035641217 |
19 | 316076669383 |
20 | 1468413601183 |
21 | 6821884412881 |
22 | 31692778455073 |
23 | 147236767058935 |
[1,1,7,31,145,673,3127,14527,67489,313537,1456615, 6767071,31438129,146053729,678529303,3152278399, 14644701505,68035641217,316076669383, 1468413601183,6821884412881,31692778455073, 147236767058935] |