n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 1 |
3 | 5 |
4 | 9 |
5 | 30 |
6 | 68 |
7 | 195 |
8 | 483 |
9 | 1309 |
10 | 3355 |
11 | 8900 |
12 | 23112 |
13 | 60813 |
14 | 158717 |
15 | 416325 |
16 | 1088661 |
17 | 2852242 |
18 | 7463884 |
19 | 19546175 |
20 | 51163695 |
21 | 133962621 |
22 | 350695511 |
23 | 918170280 |
24 | 2403740304 |
25 | 6293172025 |
26 | 16475579353 |
27 | 43133883845 |
28 | 112925557953 |
[0,1,1,5,9,30,68,195,483,1309,3355,8900,23112, 60813,158717,416325,1088661,2852242,7463884, 19546175,51163695,133962621,350695511,918170280, 2403740304,6293172025,16475579353,43133883845, 112925557953] |