n | a(n) |
---|---|
1 | 1 |
2 | 2 |
3 | 4 |
4 | 7 |
5 | 24 |
6 | 46 |
7 | 138 |
8 | 507 |
9 | 1466 |
10 | 3641 |
11 | 4806 |
12 | 106716 |
13 | 301330 |
14 | 1173587 |
15 | 1771791 |
16 | 7868294 |
17 | 156060995 |
18 | 8126341146 |
19 | 64642714833 |
20 | 292435587912 |
21 | 586597464339 |
22 | 1138023523395 |
23 | 2232671126262 |
24 | 21006004690614 |
25 | 28738943640898 |
26 | 570863391802477 |
27 | 88656067576349103 |
[1,2,4,7,24,46,138,507,1466,3641,4806,106716, 301330,1173587,1771791,7868294,156060995, 8126341146,64642714833,292435587912,586597464339, 1138023523395,2232671126262,21006004690614, 28738943640898,570863391802477,88656067576349103] |