n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 7 |
3 | 43 |
4 | 259 |
5 | 1555 |
6 | 9331 |
7 | 55987 |
8 | 335923 |
9 | 2015539 |
10 | 12093235 |
11 | 72559411 |
12 | 435356467 |
13 | 2612138803 |
14 | 15672832819 |
15 | 94036996915 |
16 | 564221981491 |
17 | 3385331888947 |
18 | 20311991333683 |
19 | 121871948002099 |
20 | 731231688012595 |
21 | 4387390128075571 |
[0,1,7,43,259,1555,9331,55987,335923,2015539, 12093235,72559411,435356467,2612138803, 15672832819,94036996915,564221981491, 3385331888947,20311991333683,121871948002099, 731231688012595,4387390128075571] |