n | a(n) |
---|---|
1 | 1 |
2 | 4 |
3 | 9 |
4 | 23 |
5 | 59 |
6 | 154 |
7 | 407 |
8 | 1088 |
9 | 2935 |
10 | 7980 |
11 | 21843 |
12 | 60139 |
13 | 166425 |
14 | 462638 |
15 | 1291245 |
16 | 3616923 |
17 | 10164335 |
18 | 28648092 |
19 | 80960915 |
20 | 229360649 |
21 | 651237509 |
22 | 1852936294 |
23 | 5282196109 |
24 | 15084862158 |
25 | 43150636493 |
26 | 123624304356 |
27 | 354689105733 |
[1,4,9,23,59,154,407,1088,2935,7980,21843,60139, 166425,462638,1291245,3616923,10164335,28648092, 80960915,229360649,651237509,1852936294, 5282196109,15084862158,43150636493,123624304356, 354689105733] |