n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 6 |
3 | 12 |
4 | 31 |
5 | 72 |
6 | 178 |
7 | 430 |
8 | 1071 |
9 | 2654 |
10 | 6680 |
11 | 16858 |
12 | 42926 |
13 | 109778 |
14 | 282490 |
15 | 730028 |
16 | 1895456 |
17 | 4940094 |
18 | 12923600 |
19 | 33919416 |
20 | 89301052 |
21 | 235762572 |
22 | 624057892 |
23 | 1655817422 |
24 | 4403189781 |
25 | 11733247076 |
26 | 31326037116 |
27 | 83786187152 |
28 | 224475807465 |
[1,2,6,12,31,72,178,430,1071,2654,6680,16858, 42926,109778,282490,730028,1895456,4940094, 12923600,33919416,89301052,235762572,624057892, 1655817422,4403189781,11733247076,31326037116, 83786187152,224475807465] |