n | a(n) |
---|---|
1 | 1 |
2 | 3 |
3 | 12 |
4 | 52 |
5 | 236 |
6 | 1109 |
7 | 5366 |
8 | 26639 |
9 | 135300 |
10 | 701269 |
11 | 3700400 |
12 | 19834973 |
13 | 107784622 |
14 | 592705377 |
15 | 3292970302 |
16 | 18458954896 |
17 | 104276682820 |
18 | 593056996445 |
19 | 3392898090908 |
20 | 19512100041995 |
21 | 112729617387020 |
22 | 653965783541960 |
23 | 3807766434556940 |
[1,3,12,52,236,1109,5366,26639,135300,701269, 3700400,19834973,107784622,592705377,3292970302, 18458954896,104276682820,593056996445, 3392898090908,19512100041995,112729617387020, 653965783541960,3807766434556940] |