n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 7 |
3 | 20 |
4 | 59 |
5 | 162 |
6 | 449 |
7 | 1200 |
8 | 3194 |
9 | 8348 |
10 | 21646 |
11 | 55480 |
12 | 141152 |
13 | 356056 |
14 | 892284 |
15 | 2221208 |
16 | 5497945 |
17 | 13533858 |
18 | 33151571 |
19 | 80826748 |
20 | 196219393 |
21 | 474425518 |
22 | 1142758067 |
23 | 2742784304 |
24 | 6561052331 |
25 | 15645062126 |
26 | 37194451937 |
27 | 88174252924 |
28 | 208463595471 |
29 | 491585775018 |
[1,2,7,20,59,162,449,1200,3194,8348,21646,55480, 141152,356056,892284,2221208,5497945,13533858, 33151571,80826748,196219393,474425518,1142758067, 2742784304,6561052331,15645062126,37194451937, 88174252924,208463595471,491585775018] |