n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 5 |
4 | 15 |
5 | 52 |
6 | 203 |
7 | 877 |
8 | 4140 |
9 | 21147 |
10 | 115975 |
11 | 562595 |
12 | 2504665 |
13 | 10579224 |
14 | 43453459 |
15 | 176472854 |
16 | 716369167 |
17 | 2927448727 |
18 | 12099445274 |
19 | 50734619570 |
20 | 216264854789 |
21 | 928045216933 |
22 | 3986352066095 |
23 | 17086933963355 |
24 | 72987960721209 |
25 | 310631150855373 |
26 | 1317808552742134 |
[1,1,2,5,15,52,203,877,4140,21147,115975,562595, 2504665,10579224,43453459,176472854,716369167, 2927448727,12099445274,50734619570,216264854789, 928045216933,3986352066095,17086933963355, 72987960721209,310631150855373,1317808552742134] |