n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 4 |
3 | 9 |
4 | 21 |
5 | 50 |
6 | 121 |
7 | 296 |
8 | 730 |
9 | 1812 |
10 | 4521 |
11 | 11328 |
12 | 28485 |
13 | 71844 |
14 | 181674 |
15 | 460443 |
16 | 1169283 |
17 | 2974574 |
18 | 7578937 |
19 | 19337489 |
20 | 49401526 |
21 | 126350742 |
22 | 323495259 |
23 | 829033334 |
24 | 2126454271 |
25 | 5458711430 |
26 | 14023219126 |
27 | 36049991901 |
28 | 92734505565 |
[1,2,4,9,21,50,121,296,730,1812,4521,11328,28485, 71844,181674,460443,1169283,2974574,7578937, 19337489,49401526,126350742,323495259,829033334, 2126454271,5458711430,14023219126,36049991901, 92734505565] |