n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 5 |
3 | 18 |
4 | 66 |
5 | 234 |
6 | 931 |
7 | 3768 |
8 | 14868 |
9 | 62079 |
10 | 262221 |
11 | 1088156 |
12 | 4673851 |
13 | 20235559 |
14 | 86466939 |
15 | 378333205 |
16 | 1664920163 |
17 | 7252032306 |
18 | 32147861808 |
19 | 143128870572 |
20 | 631965293765 |
21 | 2828788664820 |
22 | 12705192301169 |
23 | 56670108122926 |
24 | 255577539573779 |
25 | 1155787880338026 |
26 | 5196053668562184 |
27 | 23574579310744286 |
[1,2,5,18,66,234,931,3768,14868,62079,262221, 1088156,4673851,20235559,86466939,378333205, 1664920163,7252032306,32147861808,143128870572, 631965293765,2828788664820,12705192301169, 56670108122926,255577539573779,1155787880338026, 5196053668562184,23574579310744286] |