n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 15 |
3 | 142 |
4 | 1533 |
5 | 17924 |
6 | 220936 |
7 | 2827218 |
8 | 37202580 |
9 | 500228562 |
10 | 6842899886 |
11 | 94931338876 |
12 | 1332438761910 |
13 | 18887047322030 |
14 | 269986427261981 |
15 | 3887654399820062 |
16 | 56337997080499605 |
17 | 821021578186212094 |
18 | 12024687038651388155 |
19 | 176900548019426869808 |
20 | 2612917215947948178941 |
[1,2,15,142,1533,17924,220936,2827218,37202580, 500228562,6842899886,94931338876,1332438761910, 18887047322030,269986427261981,3887654399820062, 56337997080499605,821021578186212094, 12024687038651388155,176900548019426869808, 2612917215947948178941] |