n | a(n) |
---|---|
0 | 1 |
1 | 3 |
2 | 15 |
3 | 93 |
4 | 639 |
5 | 4653 |
6 | 35169 |
7 | 272835 |
8 | 2157759 |
9 | 17319837 |
10 | 140668065 |
11 | 1153462995 |
12 | 9533639025 |
13 | 79326566595 |
14 | 663835030335 |
15 | 5582724468093 |
16 | 47152425626559 |
17 | 399769750195965 |
18 | 3400775573443089 |
19 | 29016970072920387 |
20 | 248256043372999089 |
[1,3,15,93,639,4653,35169,272835,2157759,17319837, 140668065,1153462995,9533639025,79326566595, 663835030335,5582724468093,47152425626559, 399769750195965,3400775573443089, 29016970072920387,248256043372999089] |