n | a(n) |
---|---|
0 | 1 |
1 | 6 |
2 | 42 |
3 | 287 |
4 | 1968 |
5 | 13488 |
6 | 92449 |
7 | 633654 |
8 | 4343130 |
9 | 29768255 |
10 | 204034656 |
11 | 1398474336 |
12 | 9585285697 |
13 | 65698525542 |
14 | 450304393098 |
15 | 3086432226143 |
16 | 21154721189904 |
17 | 144996616103184 |
18 | 993821591532385 |
19 | 6811754524623510 |
20 | 46688460080832186 |
21 | 320007466041201791 |
[1,6,42,287,1968,13488,92449,633654,4343130, 29768255,204034656,1398474336,9585285697, 65698525542,450304393098,3086432226143, 21154721189904,144996616103184,993821591532385, 6811754524623510,46688460080832186, 320007466041201791] |