n | a(n) |
---|---|
0 | 1 |
1 | 3 |
2 | 12 |
3 | 37 |
4 | 111 |
5 | 303 |
6 | 804 |
7 | 2022 |
8 | 4950 |
9 | 11715 |
10 | 27081 |
11 | 61083 |
12 | 135112 |
13 | 293142 |
14 | 625620 |
15 | 1314267 |
16 | 2722323 |
17 | 5564172 |
18 | 11234865 |
19 | 22424904 |
20 | 44284545 |
21 | 86573147 |
22 | 167648418 |
23 | 321746907 |
24 | 612274678 |
25 | 1155782109 |
26 | 2165116416 |
27 | 4026391221 |
28 | 7435806048 |
29 | 13641093684 |
30 | 24865920932 |
[1,3,12,37,111,303,804,2022,4950,11715,27081, 61083,135112,293142,625620,1314267,2722323, 5564172,11234865,22424904,44284545,86573147, 167648418,321746907,612274678,1155782109, 2165116416,4026391221,7435806048,13641093684, 24865920932] |