n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 4 |
3 | 10 |
4 | 38 |
5 | 127 |
6 | 494 |
7 | 1810 |
8 | 7268 |
9 | 27912 |
10 | 114154 |
11 | 451876 |
12 | 1870214 |
13 | 7556208 |
14 | 31544667 |
15 | 129329742 |
16 | 543487817 |
17 | 2252645560 |
18 | 9516508678 |
19 | 39775691833 |
20 | 168765617735 |
21 | 710070538250 |
22 | 3023728881311 |
23 | 12790562936592 |
24 | 54635201884356 |
25 | 232135353844036 |
26 | 994221665514359 |
27 | 4239978191222562 |
[1,1,4,10,38,127,494,1810,7268,27912,114154, 451876,1870214,7556208,31544667,129329742, 543487817,2252645560,9516508678,39775691833, 168765617735,710070538250,3023728881311, 12790562936592,54635201884356,232135353844036, 994221665514359,4239978191222562] |