n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 6 |
3 | 22 |
4 | 92 |
5 | 423 |
6 | 2087 |
7 | 10856 |
8 | 58765 |
9 | 327877 |
10 | 1872490 |
11 | 10890483 |
12 | 64267612 |
13 | 383773529 |
14 | 2314271146 |
15 | 14071475748 |
16 | 86165249745 |
17 | 530862665988 |
18 | 3288219482754 |
19 | 20464419717069 |
20 | 127901478759153 |
21 | 802421158028657 |
[1,2,6,22,92,423,2087,10856,58765,327877,1872490, 10890483,64267612,383773529,2314271146, 14071475748,86165249745,530862665988, 3288219482754,20464419717069,127901478759153, 802421158028657] |