n | a(n) |
---|---|
3 | 1 |
4 | 1 |
5 | 5 |
6 | 17 |
7 | 57 |
8 | 190 |
9 | 623 |
10 | 2010 |
11 | 6395 |
12 | 20103 |
13 | 62561 |
14 | 193062 |
15 | 591637 |
16 | 1802551 |
17 | 5465275 |
18 | 16503365 |
19 | 49665179 |
20 | 149033583 |
21 | 446131159 |
22 | 1332749213 |
23 | 3974445543 |
24 | 11834777320 |
25 | 35196098205 |
26 | 104558824915 |
27 | 310332568225 |
28 | 920350334943 |
[1,1,5,17,57,190,623,2010,6395,20103,62561,193062, 591637,1802551,5465275,16503365,49665179, 149033583,446131159,1332749213,3974445543, 11834777320,35196098205,104558824915,310332568225, 920350334943] |