n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 3 |
4 | 14 |
5 | 80 |
6 | 518 |
7 | 3647 |
8 | 27274 |
9 | 213480 |
10 | 1731652 |
11 | 14455408 |
12 | 123552488 |
13 | 1077096124 |
14 | 9548805240 |
15 | 85884971043 |
16 | 782242251522 |
17 | 7203683481720 |
18 | 66989439309452 |
19 | 628399635777936 |
20 | 5940930064989720 |
21 | 56562734108608536 |
[1,1,3,14,80,518,3647,27274,213480,1731652, 14455408,123552488,1077096124,9548805240, 85884971043,782242251522,7203683481720, 66989439309452,628399635777936,5940930064989720, 56562734108608536] |