n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 5 |
3 | 13 |
4 | 45 |
5 | 141 |
6 | 461 |
7 | 1485 |
8 | 4813 |
9 | 15565 |
10 | 50381 |
11 | 163021 |
12 | 527565 |
13 | 1707213 |
14 | 5524685 |
15 | 17878221 |
16 | 57855181 |
17 | 187223245 |
18 | 605867213 |
19 | 1960627405 |
20 | 6344723661 |
21 | 20531956941 |
22 | 66442808525 |
23 | 215013444813 |
24 | 695798123725 |
25 | 2251650026701 |
26 | 7286492548301 |
27 | 23579585203405 |
28 | 76305140600013 |
[1,1,5,13,45,141,461,1485,4813,15565,50381,163021, 527565,1707213,5524685,17878221,57855181, 187223245,605867213,1960627405,6344723661, 20531956941,66442808525,215013444813,695798123725, 2251650026701,7286492548301,23579585203405, 76305140600013] |