n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 6 |
3 | 19 |
4 | 60 |
5 | 185 |
6 | 559 |
7 | 1662 |
8 | 4875 |
9 | 14134 |
10 | 40564 |
11 | 115370 |
12 | 325465 |
13 | 911355 |
14 | 2534595 |
15 | 7004827 |
16 | 19246626 |
17 | 52596377 |
18 | 143006632 |
19 | 386984573 |
20 | 1042537831 |
21 | 2796803110 |
22 | 7473161196 |
23 | 19893461042 |
24 | 52767059608 |
25 | 139488323734 |
26 | 367540167625 |
27 | 965445514862 |
28 | 2528516552660 |
[1,2,6,19,60,185,559,1662,4875,14134,40564,115370, 325465,911355,2534595,7004827,19246626,52596377, 143006632,386984573,1042537831,2796803110, 7473161196,19893461042,52767059608,139488323734, 367540167625,965445514862,2528516552660] |