n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 4 |
4 | 9 |
5 | 21 |
6 | 55 |
7 | 146 |
8 | 415 |
9 | 1212 |
10 | 3653 |
11 | 11246 |
12 | 35346 |
13 | 112750 |
14 | 364714 |
15 | 1193202 |
16 | 3943557 |
17 | 13148575 |
18 | 44186841 |
19 | 149536376 |
20 | 509270554 |
21 | 1744342614 |
22 | 6005869285 |
23 | 20777091355 |
24 | 72192026878 |
25 | 251848377631 |
26 | 881865312582 |
27 | 3098564357293 |
28 | 10922162622233 |
29 | 38614641384893 |
[1,1,2,4,9,21,55,146,415,1212,3653,11246,35346, 112750,364714,1193202,3943557,13148575,44186841, 149536376,509270554,1744342614,6005869285, 20777091355,72192026878,251848377631,881865312582, 3098564357293,10922162622233,38614641384893] |