n | a(n) |
---|---|
1 | 1 |
2 | 2 |
3 | 4 |
4 | 10 |
5 | 24 |
6 | 66 |
7 | 180 |
8 | 522 |
9 | 1532 |
10 | 4624 |
11 | 14136 |
12 | 43930 |
13 | 137908 |
14 | 437502 |
15 | 1399068 |
16 | 4507352 |
17 | 14611576 |
18 | 47633486 |
19 | 156047204 |
20 | 513477502 |
21 | 1696305728 |
22 | 5623993944 |
23 | 18706733128 |
24 | 62408176762 |
25 | 208769240140 |
26 | 700129713630 |
27 | 2353386723912 |
[1,2,4,10,24,66,180,522,1532,4624,14136,43930, 137908,437502,1399068,4507352,14611576,47633486, 156047204,513477502,1696305728,5623993944, 18706733128,62408176762,208769240140,700129713630, 2353386723912] |