n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 3 |
3 | 8 |
4 | 23 |
5 | 63 |
6 | 172 |
7 | 471 |
8 | 1287 |
9 | 3516 |
10 | 9607 |
11 | 26247 |
12 | 71708 |
13 | 195911 |
14 | 535239 |
15 | 1462300 |
16 | 3995079 |
17 | 10914759 |
18 | 29819676 |
19 | 81468871 |
20 | 222577095 |
21 | 608091932 |
22 | 1661338055 |
23 | 4538859975 |
24 | 12400396060 |
25 | 33878512071 |
26 | 92557816263 |
27 | 252872656668 |
[0,1,3,8,23,63,172,471,1287,3516,9607,26247,71708, 195911,535239,1462300,3995079,10914759,29819676, 81468871,222577095,608091932,1661338055, 4538859975,12400396060,33878512071,92557816263, 252872656668] |