n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | 3 |
4 | 9 |
5 | 39 |
6 | 193 |
7 | 1135 |
8 | 7585 |
9 | 57055 |
10 | 476161 |
11 | 4366399 |
12 | 43627393 |
13 | 471693439 |
14 | 5486186497 |
15 | 68296367871 |
16 | 906012795393 |
17 | 12758750871039 |
18 | 190081374027777 |
19 | 2986828127798271 |
20 | 49367131036252161 |
21 | 856162355062638591 |
22 | 15545263081776742401 |
23 | 294905583408022810623 |
[1,1,1,3,9,39,193,1135,7585,57055,476161,4366399, 43627393,471693439,5486186497,68296367871, 906012795393,12758750871039,190081374027777, 2986828127798271,49367131036252161, 856162355062638591,15545263081776742401, 294905583408022810623] |