n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 1 |
3 | 1 |
4 | 1 |
5 | 3 |
6 | 14 |
7 | 50 |
8 | 141 |
9 | 357 |
10 | 957 |
11 | 2977 |
12 | 10023 |
13 | 33145 |
14 | 104788 |
15 | 324700 |
16 | 1021972 |
17 | 3313866 |
18 | 10941283 |
19 | 36150319 |
20 | 118733636 |
21 | 389270860 |
22 | 1282538880 |
23 | 4257534180 |
24 | 14209589940 |
25 | 47521738212 |
26 | 159015643218 |
27 | 532696723370 |
28 | 1788631842842 |
29 | 6022167998854 |
30 | 20322687778376 |
[0,1,1,1,1,3,14,50,141,357,957,2977,10023,33145, 104788,324700,1021972,3313866,10941283,36150319, 118733636,389270860,1282538880,4257534180, 14209589940,47521738212,159015643218,532696723370, 1788631842842,6022167998854,20322687778376] |