n | a(n) |
---|---|
0 | 1 |
1 | 5 |
2 | 18 |
3 | 65 |
4 | 238 |
5 | 882 |
6 | 3300 |
7 | 12441 |
8 | 47190 |
9 | 179894 |
10 | 688636 |
11 | 2645370 |
12 | 10192588 |
13 | 39373700 |
14 | 152443080 |
15 | 591385545 |
16 | 2298248550 |
17 | 8945490510 |
18 | 34867625100 |
19 | 136079265630 |
20 | 531693754020 |
21 | 2079632696700 |
22 | 8141948163960 |
23 | 31904544069450 |
24 | 125120702290428 |
25 | 491056586546652 |
[1,5,18,65,238,882,3300,12441,47190,179894,688636, 2645370,10192588,39373700,152443080,591385545, 2298248550,8945490510,34867625100,136079265630, 531693754020,2079632696700,8141948163960, 31904544069450,125120702290428,491056586546652] |