n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | 2 |
4 | 5 |
5 | 15 |
6 | 53 |
7 | 205 |
8 | 865 |
9 | 3928 |
10 | 18943 |
11 | 96387 |
12 | 514745 |
13 | 2871568 |
14 | 16670197 |
15 | 100400979 |
16 | 625756254 |
17 | 4026925835 |
18 | 26705001158 |
19 | 182188059474 |
20 | 1276736262332 |
21 | 9178023547010 |
22 | 67597658864028 |
23 | 509525556949153 |
24 | 3926577535219879 |
25 | 30908466065826275 |
26 | 248308190295151020 |
[1,1,1,2,5,15,53,205,865,3928,18943,96387,514745, 2871568,16670197,100400979,625756254,4026925835, 26705001158,182188059474,1276736262332, 9178023547010,67597658864028,509525556949153, 3926577535219879,30908466065826275, 248308190295151020] |