n | a(n) |
---|---|
1 | 1 |
2 | 5 |
3 | 16 |
4 | 50 |
5 | 147 |
6 | 422 |
7 | 1210 |
8 | 3459 |
9 | 9878 |
10 | 28189 |
11 | 80425 |
12 | 229411 |
13 | 654311 |
14 | 1866003 |
15 | 5321194 |
16 | 15173321 |
17 | 43264523 |
18 | 123357771 |
19 | 351712022 |
20 | 1002758190 |
21 | 2858875748 |
22 | 8150529454 |
23 | 23236408366 |
24 | 66243882238 |
25 | 188849982251 |
26 | 538372895393 |
27 | 1534776215805 |
28 | 4375251800924 |
[1,5,16,50,147,422,1210,3459,9878,28189,80425, 229411,654311,1866003,5321194,15173321,43264523, 123357771,351712022,1002758190,2858875748, 8150529454,23236408366,66243882238,188849982251, 538372895393,1534776215805,4375251800924] |