n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | 4 |
4 | 5 |
5 | 16 |
6 | 142 |
7 | 274 |
8 | 989 |
9 | 4288 |
10 | 85946 |
11 | 198694 |
12 | 956474 |
13 | 4175406 |
14 | 27422046 |
15 | 987716734 |
16 | 2795429469 |
17 | 15572226016 |
18 | 79325378242 |
19 | 505995253870 |
20 | 4052677330190 |
21 | 262080271991458 |
22 | 855619281477786 |
23 | 5627859038743330 |
[1,1,1,4,5,16,142,274,989,4288,85946,198694, 956474,4175406,27422046,987716734,2795429469, 15572226016,79325378242,505995253870, 4052677330190,262080271991458,855619281477786, 5627859038743330] |