n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 2 |
3 | 7 |
4 | 17 |
5 | 47 |
6 | 121 |
7 | 320 |
8 | 835 |
9 | 2190 |
10 | 5730 |
11 | 15006 |
12 | 39282 |
13 | 102847 |
14 | 269252 |
15 | 704917 |
16 | 1845491 |
17 | 4831565 |
18 | 12649195 |
19 | 33116030 |
20 | 86698885 |
21 | 226980636 |
22 | 594243012 |
23 | 1555748412 |
24 | 4073002212 |
25 | 10663258237 |
26 | 27916772486 |
27 | 73087059235 |
[0,1,2,7,17,47,121,320,835,2190,5730,15006,39282, 102847,269252,704917,1845491,4831565,12649195, 33116030,86698885,226980636,594243012,1555748412, 4073002212,10663258237,27916772486,73087059235] |