n | a(n) |
---|---|
1 | 1 |
2 | 2 |
3 | 6 |
4 | 21 |
5 | 76 |
6 | 263 |
7 | 843 |
8 | 2501 |
9 | 6941 |
10 | 18245 |
11 | 45928 |
12 | 111721 |
13 | 264482 |
14 | 612707 |
15 | 1394929 |
16 | 3131269 |
17 | 6948043 |
18 | 15269985 |
19 | 33290710 |
20 | 72085673 |
21 | 155182152 |
22 | 332387343 |
23 | 708820807 |
24 | 1505731877 |
25 | 3187639497 |
26 | 6727621949 |
27 | 14159916404 |
28 | 29729158217 |
[1,2,6,21,76,263,843,2501,6941,18245,45928,111721, 264482,612707,1394929,3131269,6948043,15269985, 33290710,72085673,155182152,332387343,708820807, 1505731877,3187639497,6727621949,14159916404, 29729158217] |