n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 1 |
3 | 3 |
4 | 8 |
5 | 25 |
6 | 77 |
7 | 258 |
8 | 871 |
9 | 3049 |
10 | 10834 |
11 | 39207 |
12 | 143609 |
13 | 532193 |
14 | 1990163 |
15 | 7503471 |
16 | 28486071 |
17 | 108809503 |
18 | 417862340 |
19 | 1612440612 |
20 | 6248778642 |
21 | 24309992576 |
22 | 94905791606 |
23 | 371691137827 |
24 | 1459935388202 |
25 | 5749666477454 |
[0,1,1,3,8,25,77,258,871,3049,10834,39207,143609, 532193,1990163,7503471,28486071,108809503, 417862340,1612440612,6248778642,24309992576, 94905791606,371691137827,1459935388202, 5749666477454] |