n | a(n) |
---|---|
1 | 2 |
2 | 13 |
3 | 66 |
4 | 286 |
5 | 1102 |
6 | 3879 |
7 | 12688 |
8 | 39050 |
9 | 114114 |
10 | 318863 |
11 | 856654 |
12 | 2222688 |
13 | 5589916 |
14 | 13668072 |
15 | 32576016 |
16 | 75845402 |
17 | 172830788 |
18 | 386088741 |
19 | 846744800 |
20 | 1825447086 |
21 | 3872819904 |
22 | 8094022001 |
23 | 16679126516 |
24 | 33916289400 |
25 | 68106769602 |
26 | 135148379654 |
27 | 265177195950 |
[2,13,66,286,1102,3879,12688,39050,114114,318863, 856654,2222688,5589916,13668072,32576016,75845402, 172830788,386088741,846744800,1825447086, 3872819904,8094022001,16679126516,33916289400, 68106769602,135148379654,265177195950] |