n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 1 |
3 | 1 |
4 | 2 |
5 | 11 |
6 | 51 |
7 | 177 |
8 | 519 |
9 | 1513 |
10 | 5042 |
11 | 18866 |
12 | 71270 |
13 | 257974 |
14 | 905425 |
15 | 3193737 |
16 | 11578842 |
17 | 42930441 |
18 | 159998493 |
19 | 593445318 |
20 | 2194106568 |
21 | 8138471667 |
22 | 30399156174 |
23 | 114219616809 |
24 | 430344635913 |
25 | 1622777285682 |
26 | 6125465491551 |
[0,1,1,1,2,11,51,177,519,1513,5042,18866,71270, 257974,905425,3193737,11578842,42930441,159998493, 593445318,2194106568,8138471667,30399156174, 114219616809,430344635913,1622777285682, 6125465491551] |