n | a(n) |
---|---|
1 | 1 |
2 | 3 |
3 | 7 |
4 | 23 |
5 | 73 |
6 | 240 |
7 | 819 |
8 | 2849 |
9 | 10082 |
10 | 36157 |
11 | 131071 |
12 | 479349 |
13 | 1766022 |
14 | 6547206 |
15 | 24403223 |
16 | 91382282 |
17 | 343597383 |
18 | 1296593900 |
19 | 4908534052 |
20 | 18635790301 |
21 | 70936234050 |
22 | 270649016067 |
23 | 1034834473200 |
24 | 3964436291699 |
25 | 15214863605981 |
26 | 58488306848967 |
27 | 225179981368524 |
[1,3,7,23,73,240,819,2849,10082,36157,131071, 479349,1766022,6547206,24403223,91382282, 343597383,1296593900,4908534052,18635790301, 70936234050,270649016067,1034834473200, 3964436291699,15214863605981,58488306848967, 225179981368524] |