n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 7 |
3 | 41 |
4 | 247 |
5 | 1545 |
6 | 9975 |
7 | 66057 |
8 | 446455 |
9 | 3067913 |
10 | 21372919 |
11 | 150618121 |
12 | 1071841271 |
13 | 7691763721 |
14 | 55600938999 |
15 | 404488323081 |
16 | 2959189475319 |
17 | 21757613309961 |
18 | 160691417776119 |
19 | 1191577871450121 |
20 | 8868160862158839 |
[1,1,7,41,247,1545,9975,66057,446455,3067913, 21372919,150618121,1071841271,7691763721, 55600938999,404488323081,2959189475319, 21757613309961,160691417776119,1191577871450121, 8868160862158839] |