n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 1 |
3 | 2 |
4 | 8 |
5 | 21 |
6 | 78 |
7 | 247 |
8 | 950 |
9 | 3421 |
10 | 13872 |
11 | 54925 |
12 | 235262 |
13 | 1004213 |
14 | 4533144 |
15 | 20600553 |
16 | 97664002 |
17 | 468473957 |
18 | 2324089996 |
19 | 11693569137 |
20 | 60499459054 |
21 | 317757980069 |
22 | 1709245538312 |
23 | 9335437059969 |
24 | 52066575517770 |
25 | 294787939076965 |
26 | 1700585478056756 |
27 | 9954647772211777 |
[0,0,1,2,8,21,78,247,950,3421,13872,54925,235262, 1004213,4533144,20600553,97664002,468473957, 2324089996,11693569137,60499459054,317757980069, 1709245538312,9335437059969,52066575517770, 294787939076965,1700585478056756,9954647772211777] |