n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 5 |
4 | 14 |
5 | 42 |
6 | 131 |
7 | 425 |
8 | 1405 |
9 | 4768 |
10 | 16355 |
11 | 57112 |
12 | 200908 |
13 | 715945 |
14 | 2563950 |
15 | 9275069 |
16 | 33670472 |
17 | 123183827 |
18 | 451968108 |
19 | 1668602686 |
20 | 6173397451 |
21 | 22959862085 |
22 | 85535398344 |
23 | 320037864300 |
24 | 1199162682255 |
25 | 4509735549128 |
26 | 16979368985245 |
27 | 64134400212097 |
[1,1,2,5,14,42,131,425,1405,4768,16355,57112, 200908,715945,2563950,9275069,33670472,123183827, 451968108,1668602686,6173397451,22959862085, 85535398344,320037864300,1199162682255, 4509735549128,16979368985245,64134400212097] |