n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 1 |
3 | 3 |
4 | 7 |
5 | 18 |
6 | 46 |
7 | 119 |
8 | 309 |
9 | 805 |
10 | 2101 |
11 | 5490 |
12 | 14356 |
13 | 37557 |
14 | 98281 |
15 | 257231 |
16 | 673323 |
17 | 1762594 |
18 | 4614226 |
19 | 12079707 |
20 | 31624285 |
21 | 82792161 |
22 | 216750601 |
23 | 567457058 |
24 | 1485616392 |
25 | 3889385353 |
26 | 10182528721 |
27 | 26658183099 |
28 | 69791991919 |
[0,1,1,3,7,18,46,119,309,805,2101,5490,14356, 37557,98281,257231,673323,1762594,4614226, 12079707,31624285,82792161,216750601,567457058, 1485616392,3889385353,10182528721,26658183099, 69791991919] |