n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 6 |
3 | 19 |
4 | 56 |
5 | 168 |
6 | 505 |
7 | 1514 |
8 | 4542 |
9 | 13627 |
10 | 40880 |
11 | 122640 |
12 | 367921 |
13 | 1103762 |
14 | 3311286 |
15 | 9933859 |
16 | 29801576 |
17 | 89404728 |
18 | 268214185 |
19 | 804642554 |
20 | 2413927662 |
21 | 7241782987 |
22 | 21725348960 |
23 | 65176046880 |
24 | 195528140641 |
25 | 586584421922 |
26 | 1759753265766 |
27 | 5279259797299 |
28 | 15837779391896 |
[1,2,6,19,56,168,505,1514,4542,13627,40880,122640, 367921,1103762,3311286,9933859,29801576,89404728, 268214185,804642554,2413927662,7241782987, 21725348960,65176046880,195528140641,586584421922, 1759753265766,5279259797299,15837779391896] |