n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 2 |
3 | 4 |
4 | 10 |
5 | 26 |
6 | 75 |
7 | 234 |
8 | 768 |
9 | 2647 |
10 | 9466 |
11 | 34818 |
12 | 131149 |
13 | 503640 |
14 | 1965552 |
15 | 7777081 |
16 | 31138051 |
17 | 125961762 |
18 | 514189976 |
19 | 2115922969 |
20 | 8769932062 |
21 | 36584593158 |
22 | 153510347137 |
23 | 647564907923 |
24 | 2744951303121 |
25 | 11687358605310 |
26 | 49965976656637 |
27 | 214423520420723 |
28 | 923399052307921 |
[1,2,2,4,10,26,75,234,768,2647,9466,34818,131149, 503640,1965552,7777081,31138051,125961762, 514189976,2115922969,8769932062,36584593158, 153510347137,647564907923,2744951303121, 11687358605310,49965976656637,214423520420723, 923399052307921] |