n | a(n) |
---|---|
0 | 1 |
1 | 4 |
2 | 28 |
3 | 258 |
4 | 2892 |
5 | 37778 |
6 | 560124 |
7 | 9256010 |
8 | 168182044 |
9 | 3325057826 |
10 | 70934634236 |
11 | 1621828212826 |
12 | 39517131361884 |
13 | 1021237022557682 |
14 | 27877344103738940 |
15 | 800976143703407210 |
16 | 24148078430008534428 |
[1,4,28,258,2892,37778,560124,9256010,168182044, 3325057826,70934634236,1621828212826, 39517131361884,1021237022557682,27877344103738940, 800976143703407210,24148078430008534428] |