n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 3 |
4 | 7 |
5 | 21 |
6 | 60 |
7 | 189 |
8 | 595 |
9 | 1948 |
10 | 6455 |
11 | 21804 |
12 | 74464 |
13 | 257311 |
14 | 896874 |
15 | 3151564 |
16 | 11148982 |
17 | 39680010 |
18 | 141969156 |
19 | 510352307 |
20 | 1842370850 |
21 | 6676349598 |
22 | 24277171876 |
23 | 88556616799 |
24 | 323959047186 |
25 | 1188237214539 |
26 | 4368874535437 |
27 | 16099389598907 |
28 | 59449932709972 |
29 | 219953954227839 |
[1,1,3,7,21,60,189,595,1948,6455,21804,74464, 257311,896874,3151564,11148982,39680010,141969156, 510352307,1842370850,6676349598,24277171876, 88556616799,323959047186,1188237214539, 4368874535437,16099389598907,59449932709972, 219953954227839] |