n | a(n) |
---|---|
1 | 3 |
2 | 18 |
3 | 46 |
4 | 137 |
5 | 401 |
6 | 1152 |
7 | 3336 |
8 | 9720 |
9 | 28277 |
10 | 82174 |
11 | 238829 |
12 | 694135 |
13 | 2017380 |
14 | 5863430 |
15 | 17042197 |
16 | 49533046 |
17 | 143966504 |
18 | 418434888 |
19 | 1216170841 |
20 | 3534771986 |
21 | 10273734201 |
22 | 29860375290 |
23 | 86788495974 |
24 | 252248762928 |
25 | 733155217213 |
[3,18,46,137,401,1152,3336,9720,28277,82174, 238829,694135,2017380,5863430,17042197,49533046, 143966504,418434888,1216170841,3534771986, 10273734201,29860375290,86788495974,252248762928, 733155217213] |