n | a(n) |
---|---|
1 | 1 |
2 | 6 |
3 | 30 |
4 | 158 |
5 | 846 |
6 | 4446 |
7 | 22734 |
8 | 113310 |
9 | 552654 |
10 | 2647390 |
11 | 12492366 |
12 | 58202526 |
13 | 268228430 |
14 | 1224529758 |
15 | 5544352206 |
16 | 24921415326 |
17 | 111297979854 |
18 | 494186360670 |
19 | 2182903872334 |
20 | 9596971862430 |
21 | 42012203555406 |
22 | 183197641092446 |
[1,6,30,158,846,4446,22734,113310,552654,2647390, 12492366,58202526,268228430,1224529758,5544352206, 24921415326,111297979854,494186360670, 2182903872334,9596971862430,42012203555406, 183197641092446] |